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Xiu-yang Li

Publications and source records attributed to Xiu-yang Li.

10 recordsLinked to original sources
PubMed2006

[Value of Hounsfield unit on CT in prediction of stone-free rate of upper urinary calculi after extracorporeal shockwave lithotripsy].

OBJECTIVE: To study the value of Hounsfield unit (HU) on CT in prediction of stone-free rate of upper urinary calculi after extracorporeal shockwave lithotripsy (ESWL). METHODS: Fifty-two patients suffering from solitary stone in the upper urinary tract 0.5 - 1.5 cm in size, 34 males and 18 females, aged 15 - 77, underwent non-contrast helical computerized tomography (NCHCT), and then ESWL. One day, 2 weeks, 4 weeks, and 3 months after the ESWL the patients underwent kidney, ureter, and bladder examination and B mode ultrasonography. The patients with the residual fragments less than 3 mm in size were categorized into the stone-free group. The relationship among the HU, number of shock wave, and the characteristics of the patients were analyzed. RESULTS: Thirty-six of the 52 patients were categorized into the stone-free group (69.2%) and 16 of the 52 were categorized into the residual stone group (30.8%). The CT value of the stone-free group was 579.65 +/- 194.65 HU, significantly lower than that of the residual stone group (1032.18 +/- 270.49 HU, t = 6.842, P < 0.01). The number of shock wave of the stone-free group was 1526.67 +/- 723.01, significantly lower than that of the residual stone group (2612.50 +/- 518.81, t = 5.407, P < 0.01). The OR values for the HU and number of shock wave were 0.993 (95% CI: 0.988 - 0.998) and 0.998 (95% CI: 0.997 - 1.000). CONCLUSION: The HU value on pretreatment NCHCT of the upper urinary tract stones can be used to predict the stone-free rate after ESWL. ESWL is not indicated to the patients of upper urinary tract stones with high values of HU.

Adolescent↗
PubMed2006

[Comment on "the reliability and validity of the effort-reward imbalance - the Chinese version"].

OBJECTIVE: To evaluate reliability and validity of the effort-reward imbalance (ERI) in the Chinese version. METHODS: A cross-sectional survey was conducted comprising a large sample of 4782 subjects in China, using ERI in the Chinese version. This scale contained 23 scaled items while the questionnaire including questions on the effort and reward at work, over-commitment, the full CES-D scale of depression and a range of other characteristics. Reliability analysis was applied to evaluate reliability of the ERI scale in the Chinese version and factor analysis was applied to analyze validity of the scale. RESULTS: Theoretical hypothesis on the ERI model was supported by the data derived in this study. Reliability and validity of the effort sub-scale, the reward sub-scale of the ERI scale in the Chinese version seemed to be better, but reliability and validity of the over-commitment sub-scale were not perfect. CONCLUSION: The results of the study showed that the effort sub-scale, the reward sub-scale of the ERI in the Chinese version was applicable to the Chinese population but the scaled items of the over-commitment sub-scale should be further modified.

China↗
PubMed2006

[Association between social psychological factors and depressive symptoms among healthcare workers].

OBJECTIVE: To explore the association between the effort-reward imbalance at work and depressive symptoms among healthcare workers. METHODS: The effort-reward imbalance at work was conceptualized in terms of the Chinese version of the effort-reward imbalance (ERI) model. Depressive symptoms were assessed by the Chinese version of the Center of Epidemiology Survey Depression (CES-D) scale. The data came from the cross-sectional survey of 1 179 healthcare workers aged between 18 and 73 employed in 6 affiliated hospitals of Zhejiang University. The questionnaire comprised questions on the effort-reward at work, over-commitment, the full CES-D scale of depression and a range of other characteristics. Univariate analyses were used with Spearman's correlation, Mann-Whitney test, Pearson chi(2) test and likelihood chi(2) test. Multivariate logistic regression analyses was used to discover factors associated with depressive symptoms. RESULTS: The prevalence of depressive symptoms among healthcare workers was 48.12% (95% CI: 45.08% to 51.16%). The prevalence of depressive symptoms among nurses was 52.40% (95% CI: 47.87% to 56.93%) higher than doctors' 44.70% (95% CI: 10.64% to 48.77%) with the significant difference (chi(2) = 6.077, P = 0.014). Positive associations were found between the high effort-low reward, level of work-related over commitment and depressive symptoms (OR = 1.859, 95% CI: 1.337 to 2.585; OR = 2.207, 95% CI: 1.656 to 2.942) among healthcare workers, respectively. CONCLUSION: The high effort-low reward and the work-related over-commitment have a negative impact on healthcare workers' health.

Adolescent↗
PubMed2005

[A connection number-based principal factor analysis forecast method to forecast the encephalitis B epidemics].

OBJECTIVE: To detect the relations between incidence rate of the epidemical encephalitis B and related factors, to provide a simple, valid and practical new method for forecasting encephalitis B eipdemics. METHODS: Connection number between the incidence rate of encephalitis B and the historical forecast factors was computed, before ranking the first, second and the third principal factor, to remove the factor with the smallest value in the light of the connection number before comparing the newest value of forecast factors with the same kind of history while the most nearly value becoming the forecasting factor value and to establish a forecasting equation according to the factor value and the consistent degree of the incidence rate of encephalitis B at that time. Finally, to put into the new factor value to get this forecast value under this equation. Assuming that there are n' (n' >or= 2) forecast factors, this time forecast value can then be directly obtained from the average of these estimate values. RESULTS: Using above forecast method to forecast the incidence rate of encephalitis B at certain place and year, the predicting value is very much close to the actual incidence rate. Difference between the predicting value forecasted by the above-mentioned method and the actual incidence rate is only 0.0264/100 000 with an accurate rate of 97.94%. CONCLUSION: This principal factor analysis forecast method based on connection number in forecasting the incidence rate of encephalitis B prevention is acceptable.

China↗
PubMed2004

[A meta-analysis of cohort studies on cancer mortality among workers exposure to chrysotile fiber alone].

OBJECTIVE: To determine there was excessive risk of malignant tumors or not among workers exposure to chrysotile fiber alone by applying a meta-analysis technique. METHODS: All data meeting the criteria of cohort studies on cancer mortality among workers exposed only to chrysotile would incorporate into the meta-analysis. The pooled standardized mortality ratios (SMR) and their corresponding 95% confidence intervals (95% CI) for main cancer sites were calculated using two approaches of unweighted ratio and random effects model. The heterogeneity and its sources of the results were examined with a Q-statistic and Z-score test. RESULTS: 26 chrysotile-exposed alone cohorts were summarized. The significantly elevated meta-SMRs for all deaths (1.28), all cancers (1.26), cancers of respiratory organs (2.24), cancer of lung (2.29) and cancer of stomach (1.27) were observed. The significantly elevated meta-SMRs for lung cancer within occupational strata were observed among textile workers (3.64), asbestos products manufacturers (3.07), miners and millers (2.24), cement products workers (1.22), and for stomach cancer among asbestos products manufacturers (1.48). Meta-SMRs for cancers at other sites were not significant. CONCLUSION: There were excessive risks of lung cancer and mesothelioma among workers exposure to chrysotile fiber alone, and likely no convincing indication of an etiological association between chrysotile exposure and cancers at other sites.

Asbestos↗
PubMed2004

[The morbidity of chronic diabetic complication with logistic regression analysis of related potential risk factors].

OBJECTIVE: To investigate the morbidity and potential risk factors of chronic diabetic complication in Zhejiang province. METHODS: In the paper the morbidity of diabetic chronic complication was illustrated, using descriptive statistics. The potential risk factors of diabetic chronic complication were studied with logistic regression modeling, using data from a large retrospective study involving 1083 patients from two hospitals in Zhejiang province. RESULTS: Principal chronic diabetic complications were found to be cardiovascular diseases, ophthalmic diseases, nephropathy, esthetic diseases, plant nerve diseases, cerebral blood vessel diseases, limbsblood vessel diseases and athletic nerve diseases. The principal potential risk factors would include the courses of diabetes and hypertension, age, age being diagnosed, blood pressure, baseline blood glucose, two hour blood glucose after dietary, HBAIC, nitroglycerine, cholesterol, high density lipoprotein cholesterol and low density lipoprotein cholesterol. CONCLUSION: The analytic method used in the paper was fit for the study of morbidity and potential risk factors of other chronic diseases complication and the discriminant function could be built for clinical diagnosis.

China↗
PubMed2003

[Quantitative study by grey system on the latent period of lung cancer induced by air pollutants].

OBJECTIVE: To calculate the latent period of lung cancer induced by air pollution. METHODS: The degree of grey incidence (DGI) between the concentrations of TSP or SO(2) and the mortality of lung cancer were assessed through a grey system model. According to the maximum values of DGI, the total latent period of lung cancer was calculated. Data was collected in H city. RESULTS: The maximum DGI value of TSP was 0.886 while the relationship between the comparison sequence from 1985 to 1989 and the reference sequence from 1994 to 1998 was greatly correlated. The maximum DGI value of SO(2) was 0.919 while the relationship between the comparison sequence from 1986 to 1990 and the reference sequence from 1994 to 1998 was most correlated. CONCLUSIONS: The latent periods of lung cancer induced by TSP and SO(2) were 7 and 8 years respectively in H city. The model of grey system was less affected by the confounding factors, and the calculation process was relatively simple. A feasible and useful new way was provided by the model of grey system for quantitative analysis of the latent period of lung cancer induced by air pollutants.

Air Pollutants↗