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Results for “Consistency”

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PubMed2002

Relationships between fecal consistency and colonic microstructure and absorptive function in dogs with and without nonspecific dietary sensitivity.

OBJECTIVE: To determine relationships between fecal consistency and colonic microstructure and absorptive function in dogs with and without nonspecific dietary sensitivity. ANIMALS: 12 dogs with nonspecific dietary sensitivity (affected) and 9 healthy dogs (controls). PROCEDURE: Affected dogs were fed 4 test diets and control dogs, 3 diets for 4 weeks each in a crossover design. Fecal consistency was assessed daily. At the end of each feeding period, electrolyte and water transport were assessed, and colonic biopsy specimens were obtained for histologic examination and measurement of crypt water uptake by use of confocal microscopy. RESULTS: Feces were consistently looser in affected dogs. In control dogs, we detected net colonic absorption of sodium and chloride and secretion of potassium and bicarbonate. Absorption of sodium and chloride was less in affected dogs, compared with controls, indicating that electrolyte transport was disrupted in affected dogs. This disruption was accentuated during feeding of diets associated with significantly poorer fecal consistency (ie, loose feces). Fecal consistency was inversely correlated with crypt water absorption, which was reduced in affected dogs. Colonic crypts were shorter and less dense in affected dogs fed diets associated with poor fecal consistency, compared with affected dogs fed other diets or with control dogs. CONCLUSIONS AND CLINICAL RELEVANCE: Colonic transport function is a major determinant of fecal consistency in dogs. Dogs with nonspecific dietary sensitivity are particularly susceptible to diet-induced changes in absorptive function. Such changes are associated with damage to colonic microstructure, disrupted electrolyte transport, and failure to dehydrate luminal contents.

Animal Feed↗

PubMed2000

When does inconsistency hurt? On the relation between phonological consistency effects and the reliability of sublexical units.

Phonological consistency describes to what extent a letter string in one word is pronounced equally in other words. Phonological reliability describes to what extent a sublexical unit is usually consistent throughout a language. The relationship between the two concepts was investigated by comparing five sublexical units (onset-consonants, vowel, end-consonants, and the concatenation of the vowel with begin- or end-consonants) in Dutch and English with respect to their reliability and to how their consistency was related to naming errors and latencies. In a regression analysis, naming latencies and errors on genuine Dutch words (consistent) and imported words (inconsistent) were predicted by the phonological consistency of the five units. The same was done for two sets of English naming data. Consistency had a much stronger effect in Dutch than in English naming studies when all five units were considered. The special role of the vowel plus end-consonants, which has been found in English naming data, could not be demonstrated in Dutch. In both languages, the size of consistency effects mirrors the reliability of the five units.

Adult↗

PubMed1990

The consistency of young children's assessment of remembered painful events.

Clinicians need to know the consistency of a child's report of his pain in order to assess the intensity of that pain. To explore an age cutoff above which children are consistent in reporting their pain, we tested the consistency of children's reports of recalled pain, using a variety of scales. We interviewed 91 children, three to eight years of age, and obtained each child's report of two of his own painful experiences. In two separate sessions, we asked each child to compare those specific experiences in several ways, using two picture scales, a block-based scale, triads, and the simple question, "which hurt you more?" Results show that children older than seven years are more consistent in reporting the relative pain intensity of remembered events than younger ones (range 50-100% vs. 20-55%, p less than 0.001), and that the simple question provides the most consistent answer. However, no age group tested was consistent more than 80% of the time on all measures. We conclude that children are able to report remembered pain intensity consistently with increasing age but that we cannot establish a firm cutoff between the ages of three and eight years with our data.

Child↗

PubMed2026

Diffusion MRI radiomics in meningiomas: imaging correlates of tumor grade and intraoperative consistency.

OBJECTIVE: Despite advancements in imaging studies, the preoperative prediction of the biological behavior and intraoperative consistency of intracranial meningiomas remains limited. This study evaluated the association of volumetric diffusion-based and texture-derived radiomic features extracted from routine MRI with histopathological aggressiveness and intraoperative tumor consistency. METHODS: Ninety-seven intracranial meningiomas resected at two tertiary centers were retrospectively analyzed. Volumetric segmentation was performed on contrast-enhanced T1-weighted MRI and coregistered to apparent diffusion coefficient (ADC) maps. Data on first-order diffusion metrics and selected texture features were collected. The associations between World Health Organization (WHO) grade and Ki-67 index were assessed using nonparametric tests and Spearman correlation analysis. Independent factors associated with intraoperative tumor consistency (Zada grades 1-5) were evaluated via multivariate ordinal logistic regression analysis that adjusted for tumor volume, skull base location, calcification status, and WHO grade. Secondary receiver operating characteristic (ROC) curve analyses were performed to differentiate solid (Zada grades 4-5) from soft (Zada grades 1-2) tumors. ROC analyses were performed within the study cohort and were intended as exploratory assessments of discriminative performance. RESULTS: The mean ADC (ADCmean) and the 10th percentile of the ADC decreased significantly with increasing WHO grade (p < 0.001). ADCmean had a moderate inverse correlation with the Ki-67 index (r = -0.42, p < 0.001) and intraoperative tumor consistency (r = -0.45, p < 0.001). In the multivariate analysis, the ADCmean remained independently associated with increasing tumor firmness. Each 0.1 × 10-3 mm2/sec increase corresponded to a 38% reduction in the odds of belonging to a higher consistency category (OR 0.62, 95% CI 0.51-0.74, p < 0.001). The ROC analysis showed good discrimination for solid tumors (area under the curve 0.847, 95% CI 0.742-0.953) and soft tumors (area under the curve 0.824, 95% CI 0.714-0.935). Texture features had weaker associations with intraoperative tumor consistency. CONCLUSIONS: Volumetric diffusion-derived metrics, particularly ADCmean, are associated with both histopathological aggressiveness and intraoperative tumor firmness in meningiomas. Diffusion imaging may reflect a graded microstructural continuum rather than a purely dichotomous property, providing complementary preoperative insights into surgical complexity.

Humans↗

PubMed1995

Consistency between maternal employment attitudes and employment status.

The stability of mothers' attitudes toward employment, employment status, and consistency between employment attitudes and behavior over a 15-month period was examined. Factors such as family finances, availability of child care, and child's health status that could influence either employment attitudes or employment behavior were explored. Mothers of preterm infants (N = 98) and mothers of full-term, healthy infants (N = 101) completed questionnaires regarding home/employment orientation, choice and satisfaction with the employment decision, and employment behavior as part of a battery of instruments administered when their infants were 3, 9, and 18 months old. Analyses indicated considerable stability in attitudes, behaviors, and consistency over a 15-month period for mothers of both full-term and preterm infants. Consistency groups were created based on employment status (employed versus not employed) and consistency status (consistent versus inconsistent) at each time point. Consistency groups differed on ratings of financial need and availability of child care.

Adult↗

PubMedDate not supplied

Masked priming of prefixes and the influence of spelling-meaning consistency.

Two experiments are reported which examined whether a prefixed word can be primed by a word sharing only the prefix letters in a masked priming paradigm. In addition the studies examined whether the size of the priming effect is influenced by the consistency with which a prefix letter pattern appears in real prefixed words. The ratio of real prefixed words to all words containing a prefix letter pattern was calculated and used to identify high-consistency prefixes, which are frequently used as prefixes (e.g., UN in UNHAPPY) and rarely appear as pseudoprefixes (e.g., UNCLE), and low-consistency prefixes, which appear in many pseudoprefixed words (e.g., DE in DESERT) but fewer truly prefixed words (e.g., DECODE). In Experiment 1, decision latencies for both types of prefixes were facilitated when real prefixed target words were preceded by real prefixed prime words in a short SOA masked priming paradigm, although the size of the priming effect for low-consistency prefixes was similar in size to that for orthographic controls. In Experiment 2, real prefixed target words were preceded by pseudoprefixed prime words. Facilitation in performance remained for high-consistency prefixes but was absent for low-consistency prefixes. These results support models of morphological processing that are sensitive to the statistical nature of the relationships between orthographic and semantic representations in a language.

Decision Making↗

PubMed1994

Meningiomas: correlation between MRI characteristics and operative findings including consistency.

The findings on magnetic resonance imaging (MRI) in 73 surgically verified intracranial meningiomas were correlated with their histology and consistency during resection. T 1-weighted imaging was least useful since most of the tumours were iso-intense, similar to cortical grey matter regardless of histology or tumour consistency. The signal intensity on T2-weighted images was found to best correlate with both the histology and consistency of the meningioma. Generally, the low intensity portion of the tumour on T2-weighted images indicated a more fibrous and harder character, while the higher intensity portions indicated a more soft character. Most of the fibroblastic meningiomas showed the features of a hard tumour while angioblastic tumours showed the features of soft tumours. Tumours predicted to be harder on MR imaging generally took longer to resect than softer ones, and this relationship was shown best for the larger tumours. Using linear regression analysis, it appears that operative time for soft tumours is more affected by factors other than tumour consistency. Blood loss during surgery was also unrelated to the consistency of the tumour. These results suggest that the histology and consistency of meningiomas may be predictable from findings on T2-weighted imaging, and this may also predict the difficulty and time required for resection.

Adolescent↗

PubMed2004

Influence of bolus consistency on lingual behaviors in sequential swallowing.

Thickened liquids are a commonly recommended intervention for dysphagia. Previous research has documented differences in temporal aspects of bolus transit for paste versus liquid consistencies; however, the influence of liquid viscosity on tongue movements during swallowing remains unstudied. We report an analysis of the influence of bolus consistency on lingual kinematics during swallowing. Electromagnetic midsagittal articulography was used to trace tongue body and dorsum movement during sequential swallows of three bolus consistencies: thin, nectar-thick, and honey-thick liquids. Rheological profiling was conducted to characterize viscosity and density differences among six liquids (two of each consistency). Eight healthy volunteers participated; four were in a younger age cohort (under age 30) and four were over the age of 50. The primary difference observed across the liquids of interest was a previously unreported phenomenon of sip-mass modulation; both flavor and density appeared to influence sip-sizing behaviors. Additionally, significantly greater variability in lingual movement patterns was observed in the older subject group. Systematic variations in lingual kinematics related to bolus consistency were restricted to the variability of downward tongue dorsum movement. Otherwise, the present analysis failed to find empirical evidence of significant modulations in tongue behaviors across the thin to honey-thick consistency range.

Adult↗

PubMed1994

Consistency of histopathological reporting of breast lesions detected by screening: findings of the U.K. National External Quality Assessment (EQA) Scheme. U. K. National Coordinating Group for Breast Screening Pathology.

The aim of the scheme was to determine consistency of histopathological reporting in the United Kingdom National Breast Screening Programme. This external quality assessment scheme involved 51 sets of 12 slides which were circulated to 186-251 pathologists at intervals of 6 months for 3 years. Participants recorded their diagnoses on standard reporting forms, which were submitted to the U.K. National Cancer Screening Evaluation Unit for analysis. A high level of consistency was achieved in diagnosing major categories of breast disease including invasive carcinoma and the important borderline lesions, radial scar and ductal carcinoma in situ (DCIS), the latter exceeding a national target set prior to the onset of the scheme. Atypical hyperplasia (AH) was reported with much less consistency although, where it was the majority opinion, over 86% of diagnoses were of benign disorders and only 14% were of DCIS. Inconsistency was encountered in subtyping and measuring DCIS, the former apparently due to current uncertainties about classification and the latter to poor circumscription, variation in size in different sections and merging with zones of AH. Reporting prognostic features of invasive carcinomas was variable. Measurement of size was achieved with adequate consistency except in a small number of very poorly circumscribed tumours. Grading and subtyping were inconsistent although the latter was not specifically tested and will be the subject of future study. Members of the National Coordinating Group achieved greater uniformity than the remainder of the participants in all diagnostic categories, but both groups experienced similar types of problem. Our findings suggest that participation in the scheme improves diagnostic consistency. In conclusion, consistency in diagnosing invasive carcinoma and radial scar is excellent, and good in DCIS, but improvements are desirable in diagnosing atypical hyperplasia, classifying DCIS and reporting certain prognostic features of invasive tumours. Such improvements will require further research, the development of improved diagnostic criteria and the dissemination of clearer guidelines.

Breast↗

PubMed2003

The effect of bolus consistency on dysphagia in unilateral vocal cord paralysis.

OBJECTIVE: To examine the risk of aspiration for liquid versus paste bolus consistencies in patients with unilateral vocal cord paralysis (UVCP). METHODS: The swallowing function of adult patients with UVCP was prospectively studied videofluorographically to examine the incidence of laryngeal penetration and aspiration for both liquid and paste boluses. The degree of penetration or aspiration was quantified using the penetration-aspiration scale (PAS). The presence and location of pharyngeal bolus residue were also documented for each consistency. Results were compared between liquid and paste bolus consistencies. RESULTS: Fifty-five patients with UVCP were studied with a mean age of 60.2 years. Intrathoracic surgery or malignancy accounted for 38 (69.1%) of cases. The mean PAS scores for liquid and paste bolus consistency were 3.1 vs. 1.5, respectively (P < 0.001). The liquid bolus penetrated in 19 (34.5%) patients and was aspirated in 11 (20%) patients. In contrast, the paste bolus penetrated in 12 (21.8%) cases and was aspirated in 0 cases (P < 0.001). Pharyngeal residue was more likely to occur at the base of the tongue or vallecula for the paste bolus consistency versus the liquid bolus. CONCLUSIONS: A significant percentage of patients with UVCP will aspirate thin liquids. Paste bolus consistencies are safer for patients with UVCP as they are much less likely to lead to penetration or aspiration despite a higher prevalence of pharyngeal residue.

Beverages↗

PubMed1998

Quantitative evaluation of consistency of normal mucosa, leukoplakia and squamous cell carcinoma of the tongue.

The quantitative differences in consistency of normal mucosa, leukoplakia and squamous cell carcinoma of the tongue were studied. Forty-five patients with squamous cell carcinoma of the tongue, 26 with leukoplakia and 80 with normal tongues were examined using an instrument capable of measuring consistency as a function of the load (in grams) needed to displace tongue mucosa by 2.0 mm using a probe 2.0 mm in diameter. The mean value for consistency in tongue carcinoma, leukoplakia and normal tongue was 22.1 +/- 8.0 g, 8.3 +/- 2.0 g and 4.8 +/- 0.7 g, respectively. Differences in consistency among these entities were significant (P < 0.001). Furthermore, consistency in tongue carcinoma was significantly correlated to tumour thickness (r = 0.954, P < 0.001). It was concluded that the consistency in tongue lesions was objectively and quantitatively evaluated by this method, and this technique could measure the thickness of the tumorous lesions preoperatively.

Adult↗

PubMed2001

Consistency in condom use in the context of HIV/AIDS in Zimbabwe.

Against the backdrop of a high prevalence of the human immunodeficiency virus infection in Zimbabwe, this paper analyses data from the 1997 Zimbabwe Sexual Behaviour and Condom Use Survey to throw light on the degree to which sexually active adults consistently use condoms in high-risk sexual situations. The multivariate results indicate that at the time of the survey, consistent condom use in non-marital relationships is significantly higher for males than females, higher among those who had access to information about condoms from multiple sources than among those with limited access, and higher among those who have positive attitudes to condoms than among those with negative attitudes. Even though consistent condom use with non-marital partners is higher for those who know a source where condoms can be obtained, this effect is due to the fact that these respondents have more positive attitudes towards condoms. Likewise, the higher levels of consistent condom use exhibited by those who are aware of the efficacy of condoms are due to the fact that men have higher awareness of this, and men use condoms more consistently than women. In sum, the results suggest that the effects of the respondents' sex and their knowledge of the prophylactic importance of condoms and where condoms might be obtained are a function of other socioeconomic advantages they have. It is, therefore, concluded that programmes that use mass media information, education and communication campaigns to reduce shyness, embarrassment and stigma about condom use can help increase consistent use of condoms in non-marital relationships in Zimbabwe.

Acquired Immunodeficiency Syndrome↗

PubMed2000

Maternal acceptance and consistency of discipline as buffers of divorce stressors on children's psychological adjustment problems.

This study examines whether two aspects of mothering--acceptance and consistency of discipline--buffer the effect of divorce stressors on adjustment problems in 678 children, ages 8 to 15, whose families had divorced within the past 2 years. Children reported on divorce stressors; both mothers and children reported on mothering and internalizing and externalizing problems. Multiple regressions indicate that for maternal report of mothering, acceptance interacted with divorce stressors in predicting both dimensions of adjustment problems, with the pattern of findings supporting a stress-buffering effect. For child report of mothering, acceptance, consistency of discipline, and divorce stressors interacted in predicting adjustment problems. The relation between divorce stressors and internalizing and externalizing problems is stronger for children who report low acceptance and low consistency of discipline than for children who report either low acceptance and high consistency of discipline or high acceptance and low consistency of discipline. Children reporting high acceptance and high consistency of discipline have the lowest levels of adjustment problems. Implications of these results for understanding variability in children's postdivorce adjustment and interventions for divorced families are discussed.

Adaptation, Psychological↗

PubMed1987

Consistency-based compliance: when and why do children become vulnerable?

This study examines the nature and development of behavioral consistency pressures in children. Specifically, we examined the effectiveness of the foot-in-the-door procedure in producing consistent prosocial behavior and self-attributions in kindergartners and second and fifth graders. Children were either induced to comply with a request to share prize coupons or were not given this initial prosocial experience. Those who complied either were labeled as helpful by an adult or were not. Later, children were given the opportunity to help under public or private circumstances. Moreover. children's understanding of trait stability, their internal preference for consistent behavior, and their belief that adults prefer behavioral consistency were assessed. Consistent responding began to occur within the foot-in-the-door procedure in the second grade, and this developmental shift was paralleled by a shift in children's understanding of trait stability. Furthermore, once the foot-in-the-door effect appeared among the second and fifth graders, its strength was significantly affected by the children's internal preference for consistency.

Child↗

PubMed1993

Effect of temporal focus on the recall of expectancy-consistent and expectancy-inconsistent information.

This research examined the impact of temporal focus on the recall of information that is consistent or inconsistent with an expectation. A consistent pattern of results across 4 experiments indicates that when Ss' expectations are temporally unfocused, better memory for consistent information is observed. In contrast, when expectations are focused in time--that is, Ss know when the relevant events are likely to occur--recall for consistent and inconsistent information is more balanced. Experiment 4 tied these recall findings to the amount of processing devoted to consistent and inconsistent events. When expectations were temporally unfocused, processing time and recall was greater for the confirmatory information. When expectations were temporally focused, more equivalent processing time and recall of consistent and inconsistent information was observed. Discussion centers on the role of temporal focus as a determinant of whether an event is one-sided or two-sided.

Adult↗

PubMed2006

Consistent resting-state networks across healthy subjects.

Functional MRI (fMRI) can be applied to study the functional connectivity of the human brain. It has been suggested that fluctuations in the blood oxygenation level-dependent (BOLD) signal during rest reflect the neuronal baseline activity of the brain, representing the state of the human brain in the absence of goal-directed neuronal action and external input, and that these slow fluctuations correspond to functionally relevant resting-state networks. Several studies on resting fMRI have been conducted, reporting an apparent similarity between the identified patterns. The spatial consistency of these resting patterns, however, has not yet been evaluated and quantified. In this study, we apply a data analysis approach called tensor probabilistic independent component analysis to resting-state fMRI data to find coherencies that are consistent across subjects and sessions. We characterize and quantify the consistency of these effects by using a bootstrapping approach, and we estimate the BOLD amplitude modulation as well as the voxel-wise cross-subject variation. The analysis found 10 patterns with potential functional relevance, consisting of regions known to be involved in motor function, visual processing, executive functioning, auditory processing, memory, and the so-called default-mode network, each with BOLD signal changes up to 3%. In general, areas with a high mean percentage BOLD signal are consistent and show the least variation around the mean. These findings show that the baseline activity of the brain is consistent across subjects exhibiting significant temporal dynamics, with percentage BOLD signal change comparable with the signal changes found in task-related experiments.

Brain↗

PubMed1996

Performance consistency in picture naming: a study of the rehabilitation effect on two aphasic patients.

We describe the effect of language rehabilitation on the naming deficits of 2 patients affected by longstanding amnestic aphasia. In particular, our aim was to study the evolution of the rate of inconsistent naming (i.e., performance with stimuli that were named sometimes correctly and sometimes incorrectly when the test was repeated at close intervals) by means of a stochastic model based on Markov chains (Faglioni & Botti, 1993). From a quantitative point of view, both patients showed a significant improvement that was still present several months after treatment. However, at baseline these patients showed different degrees of consistency which revealed a basic difference in the way their language functions. One case presented with low consistency, delayed responses, and self-corrections: A clear effect of rehabilitation was improvement in consistency and reduction of delays. In the other case, at baseline consistency was greater, but naming of pictures did not improve even after delay or self-correction; after rehabilitation more stimuli were named correctly, but only after delay and self-correction. The relevance of consistency and its relationship with delayed naming and self-corrections is discussed. It is suggested that consistency analysis based on stochastic models would make a useful contribution to the description and interpretation of naming deficits in aphasic patients.

Adult↗

PubMed2002

Consistent condom use among drug-using youth in a high HIV-risk neighbourhood.

The objectives of this study were to determine predictors of consistent condom use in heterosexual relationships of young adults who use hard drugs in a neighbourhood with widespread drug-use-connected HIV. We interviewed 196 18-24 year olds who injected drugs or used heroin, cocaine or crack in the prior year and lived in the Bushwick neighbourhood of New York City. Interviews covered sociodemographics, substance use and sexual networks. The unit of analysis is the relationship; the dependent variable measures consistent condom use over the prior 30 days in a given relationship. Consistent condom use was reported in 26% of 377 non-commercial relationships and in all of 22 commercial relationships. Using multiple logistic regression, consistent condom use in non-commercial relationships was more likely in relationships that are not 'very close'; for men (but not women) with peers whose norms are more favourable to condom use; and for subjects who had concurrent sex partners in the last 12 months. In conclusion, we found that: (1) the lack of relationship between the peer norms of drug-using women and their condom use suggests they may have little control over condom use in their relationships-programmes should attempt to empower young women drug users and to develop ways for their peers to influence the men in their lives; (2) epidemiologically, the positive association of concurrency to consistent condom use suggests that condom use may be restricting HIV spread through the community-the presence of consistent condom use in all of the commercial sexual relationships also may restrict HIV spread; (3) prevention efforts should attempt to change peer cultures as a way to develop self-sustaining risk reduction. These changes should include changes in gender roles and power relations.

Adult↗