Biomedical subjects

Cheryl B Anderson

Publications and source records attributed to Cheryl B Anderson.

11 recordsLinked to original sources

PubMed2007

Factorial and construct validity of the athletic identity questionnaire for adolescents.

PURPOSE: This research describes the development of a measure of the general attribute of "athletic" in adolescents, encompassing exercise, sport, and physical activity. Based on a theoretical model supported in adults, the 40-item Athletic Identity Questionnaire (AIQ) for adolescents assesses four dimensions: appearance, competence, importance of activity, and encouragement from three sources: parents, friends, and teachers/other adults. METHODS: Structural equation modeling was used to evaluate the hypothesized four-factor model in a development sample of 408 adolescents in eighth grade (mean age 13.4 yr). A separate sample (N = 1586) was used to cross-validate the final model. Construct validity was examined by testing the model's relationship to self-reported (Modifiable Activity Questionnaire-Adolescent, Previous Day Physical Activity Recall, Youth Risk Behavior Survey) and objectively measured physical activity (MTI accelerometer in sample 3, N = 100). RESULTS: Confirmatory factor analysis supported the four-factor structure, and there was also support for a higher-order model. LISREL correlations between the AIQ factors and self-reported physical activity ranged from 0.32 to 0.61, TV watching from -0.20 to -0.50, and sport-team participation from 0.20 to 0.54. Pearson correlations between the AIQ factors and MTI vigorous physical activity ranged from 0.09 to 0.26 and MTI moderate from -0.06 to 0.22. CONCLUSIONS: Findings support the factorial and construct validity of the AIQ for adolescents.

Adolescent↗

PubMed2006

Measuring feeding in low-income African-American and Hispanic parents.

Current feeding measures have been developed based on the premise that a child's obesity risk is increased when parents exert high levels of control over feeding. Although these measures provide useful ways to assess parental restrictiveness in feeding, they do not capture other important aspects of feeding that describe the behavior of parents not overly concerned about child obesity. Alternative measures are important to develop, especially for minority populations where concerns about child obesity are often not a significant determinant of parental feeding practices. The current study describes a culturally informed method used to develop a broader assessment of parental feeding strategies across two low-income ethnic groups. To be able to accurately measure cultural differences associated with feeding, qualitative and quantitative methods were used to assure conceptual, linguistic, and measurement equivalency across African-American and Hispanic parents. Based on responses from 231 parents, mean differences in feeding strategies were found with Hispanic parents reporting significantly more parent-centered/high control and child-centered feeding strategies compared to African-Americans. Furthermore, the relationship between children's weight status and parental feeding strategies varied by the two ethnic groups and child gender. Implications of these results for understanding the role of parental socialization in the development of child obesity are discussed.

Black or African American↗

PubMed2005

Adolescent patterns of physical activity differences by gender, day, and time of day.

BACKGROUND: More information about the physical activity of adolescents is needed. This study used objective measurement to investigate differences in activity patterns related to gender, body mass index (BMI), day, and time of day. METHODS: Eighth-grade adolescents (37 boys, 44 girls) wore the Manufacturing Technologies Inc. (MTI) accelerometer for 4 days and kept a previous-day physical activity recall diary in the fall of 2002. Minutes per hour in sedentary, light, and moderate/vigorous activity, as recorded by the MTI, and in nine activity categories, as recorded by the diary, were calculated for three time periods (6:00 am to 2:59 pm, 3:00 pm to 6:59 pm, 7:00 pm to midnight) on each day (Thursday through Sunday). RESULTS: Doubly multivariate analysis of variance revealed significant gender by day by time differences in sedentary (p =0.005) and moderate/vigorous (p <0.001) activity, but no significant BMI interactions. Except on Sunday, boys were less sedentary and more active than girls during the late afternoon period. Significant gender by category (p <0.001) and day by category (p <0.001) interactions were also found in the log data. Boys spent more time engaged in TV/electronics and sports, while girls spent more time in personal care. Three activity categories (sports, social interaction, active transportation) stayed at consistent levels across days, while others varied widely by day of the week. CONCLUSIONS: Except on Sunday, consistent gender differences were found in activity levels, especially for the late afternoon period. Significant increases in sitting, TV/electronic games, and chores were seen for weekend days. Results support strategies to reduce sitting and electronic recreation, which may increase physical activity.

Adolescent↗

PubMed2005

Cross-cultural equivalence of feeding beliefs and practices: the psychometric properties of the child feeding questionnaire among Blacks and Hispanics.

BACKGROUND: Psychometrically sound measures are considered a necessary condition for valid research. This study used structural equation modeling to examine the cross-cultural equivalence of a widely used measure of parental beliefs and practices regarding child feeding, the Child Feeding Questionnaire [Birch L.L., Fisher J.O., Grimm-Thomas K., Markey C.N., Sawyer R., Johnson S.L. Confirmatory factor analysis of the child feeding questionnaire: a measure of parental attitudes, beliefs and practices about child feeding and obesity proneness. Appetite 2001;36:201-10]. METHODS: Low-income parents of 101 Black and 130 Hispanic pre-school children (126 girls, 105 boys) completed a reduced version of the CFQ. RESULTS: Confirmatory factor analyses using LISREL 8.51 supported the hypothesized factor structure but revealed cross-cultural conceptual problems on the perceived child weight factor and problematic items on the restriction factor that were addressed in a modified model. Invariance analyses demonstrated invariance of factor structure, loadings, and covariances in the modified model across ethnic groups. MANCOVA, that controlled for parent BMI and marital status, revealed ethnic differences on the child feeding responsibility, child weight concern, and perceived weight of child factors that were moderated by parent education and child BMI. CONCLUSIONS: Results supported the use of a modified version of the CFQ among Blacks and Hispanics and revealed no ethnic differences on factor scores, except on interactions with parent education and overweight status of child.

Adult↗

PubMed2005

Race/ethnicity, smoking status, and self-generated expected outcomes from smoking among adolescents.

Racial/ethnic differences in adolescent smoking suggest that different factors may motivate smoking among various racial/ethnic groups. This study examined relations among race/ethnicity, self-generated smoking outcome expectancies, and smoking status. Our findings noted that current smoking was highest among Hispanics, whereas African Americans and Asians were least likely to ever smoke. African Americans were most likely to experiment but least likely to smoke currently. Five expectancies differed significantly by race/ethnicity: reduce tension, image, negative aesthetics, addiction, and cost. However, none were significant mediators or moderators. Racial/ethnic groups most susceptible to smoking initiation and with the highest rates of current smoking should be targeted for prevention and cessation. Research is needed to examine more thoroughly racial/ethnic differences in expectancies.

Adolescent↗

PubMed2005

Validation of the PDPAR as an adolescent diary: effect of accelerometer cut points.

PURPOSE: To evaluate the validity of the Previous Day Physical Activity Recall (PDPAR) as a physical activity diary in adolescents using two accelerometer intensity classifications. METHODS: One hundred eighth graders (47 boys, 53 girls) used the PDPAR as a daily diary and wore MTI accelerometers for four consecutive days. Measured time spent in moderate (> or = 3 METs) and vigorous (> or = 6 METs) activity was based on two published MTI cut-point limits (that of Freedson et al./Trost et al. and that of Puyau et al.). Spearman rank order correlations and Bland-Altman plots were used to examine agreement between MTI and PDPAR diary estimates of activity. RESULTS: MTI estimates of mean minutes per day of total moderate to vigorous physical activity (MVPA) were 65.2 (+/-43.2) using the Freedson et al./Trost et al. cutoffs and 17.5 (+/-18.5) using those of Puyau et al., while students self-reported 105.1 (+/-80.1) min.d(-1). Significant relationships were observed between the diary and MTI for total MVPA using either the Freedson et al./Trost et al. (r = 0.42) or Puyau et al. (r = 0.41) cutoff as well as raw counts (r = 0.44). Plots showed reasonable agreement between the diary and Freedson et al./Trost et al. MTI estimates of MVPA for daily totals of < or = 60 min, but the Puyau et al. estimates were consistently lower. Diaries overestimated activity as time increased when compared to either MTI cut point, especially on vigorous activity. CONCLUSIONS: Time estimates of MVPA differed by assessment tool, but diary estimates showed adequate association with the MTI. Diaries reflected intensity-specific activity, corresponding most closely with the Freedson et al./Trost et al. classification of moderate, but substantially overestimated vigorous activity regardless of cut-point method. This is likely due to the measurement characteristics of the PDPAR, which classifies activities in 30-min blocks, as well as the nature of common activities in which high levels of intensity are not sustained.

Acceleration↗

PubMed2005

Accelerometer data reduction: a comparison of four reduction algorithms on select outcome variables.

PURPOSE: Accelerometers are recognized as a valid and objective tool to assess free-living physical activity. Despite the widespread use of accelerometers, there is no standardized way to process and summarize data from them, which limits our ability to compare results across studies. This paper a) reviews decision rules researchers have used in the past, b) compares the impact of using different decision rules on a common data set, and c) identifies issues to consider for accelerometer data reduction. METHODS: The methods sections of studies published in 2003 and 2004 were reviewed to determine what decision rules previous researchers have used to identify wearing period, minimal wear requirement for a valid day, spurious data, number of days used to calculate the outcome variables, and extract bouts of moderate to vigorous physical activity (MVPA). For this study, four data reduction algorithms that employ different decision rules were used to analyze the same data set. RESULTS: The review showed that among studies that reported their decision rules, much variability was observed. Overall, the analyses suggested that using different algorithms impacted several important outcome variables. The most stringent algorithm yielded significantly lower wearing time, the lowest activity counts per minute and counts per day, and fewer minutes of MVPA per day. An exploratory sensitivity analysis revealed that the most stringent inclusion criterion had an impact on sample size and wearing time, which in turn affected many outcome variables. CONCLUSIONS: These findings suggest that the decision rules employed to process accelerometer data have a significant impact on important outcome variables. Until guidelines are developed, it will remain difficult to compare findings across studies.

Acceleration↗

PubMed2003

When more is better: number of motives and reasons for quitting as correlates of physical activity in women.

Understanding the mechanisms by which physical activity is influenced is particularly relevant for health promotion efforts aimed at women, who display lower levels of physical activity and may experience more barriers to exercise than men. This study examined the number of motives for exercise and the number of reasons for previous quitting as predictors of exercise behavior. Specifically, the cognitive complexity of motives for exercise and reasons for quitting, as indicators of exercise-related memory associations that reflect cognitive structure, were evaluated. In a sample of 394 women aged 17-54, number of reasons for quitting did not predict current exercise level. However, more elaborated memory networks for motives were highly related to current exercise behavior, except among women with high Center for Epidemiologic Studies Depression Scale scores. These results support the predictive superiority of positive over negative memory associations found in studies on attitude accessibility in other behaviors, such as substance use, among women of normal mood and suggest a moderating effect of depression.

Adolescent↗

PubMed2002

Relations between self-generated positive and negative expected smoking outcomes and smoking behavior: an exploratory study among adolescents.

The expected outcomes of drug use figure prominently in models of drug motivation. This report presents the relations between self-generated expected outcomes of smoking and smoking behavior in 674 adolescents. Expected outcomes of smoking were related to current smoking, experimentation, and susceptibility among never-smokers, even after controlling for key correlates of smoking behavior, including gender, grade, ethnicity, and peer smoking. Although more negative than positive smoking outcomes were accessible from memory, more positive than negative expected outcomes were correlated with smoking behavior. Both the content and number of self-generated expected outcomes provided unique associative information. In sum, greater elaboration of smoking-related memory networks, as well as the specific content of those networks, appear to be associated with smoking behavior.

Adolescent↗

PubMedDate not supplied

Ethnic differences among correlates of physical activity in women.

PURPOSE: This study investigated differences between two ethnic minority groups on five hypothesized correlates of physical activity (beliefs about the value of physical activity, normative modeling, perceived barriers, outcome expectations, and self-efficacy). DESIGN: A cross-sectional sample consisting of 246 African American and Hispanic women 40 to 70 years of age was used. Multivariate analysis of covariance including interactions with education and income was used. RESULTS: A three-way interaction (ethnicity by education by income) was significant for perceived barriers. In addition, a two-way interaction (education by income) was significant for normative modeling. CONCLUSIONS: Ethnic differences by education and income were associated with some correlates of physical activity; therefore, it is important to consider this diversity when designing physical-activity interventions for minority women.

Adult↗

PubMedDate not supplied

Gender differences in adolescent smoking: mediator and moderator effects of self-generated expected smoking outcomes.

PURPOSE: To examine relations among gender, self-generated smoking-outcome expectancies, and smoking in adolescents. METHODS: Students from one all-girls' (n=350; 53%) and one all-boys' (n=315; 47%) Catholic high school participated. Analyses included binary and ordinal logistic regression. RESULTS: For boys, smoking behavior was associated with buzz (odds radio [OR] = 1.92, 95% confidence interval [CI]: 1.31-2.83, p < .001), pleasure (OR = 1.47, 95% CI: 1.01-2.16, p = .044), taste/smell (OR = 2.17, 95% CI: 1.12-4.19, p = .022), stimulation (OR = 3.69, 95% CI: 1.32-10.28, p = .013), and exercise/sport impairment (OR = 2.84, 95% CI: 1.68-4.81, p < .001). Among girls, weight control (OR = 0.22, 95% CI: 0.13-0.36, p < .001), negative aesthetics (OR = 0.42, 95% CI: 0.28-0.64, p < .001), addiction (OR = 0.39, 95% CI: 0.28-0.55, p < .001), and negative mood (OR = 0.44, 95% CI 0.20-0.97, p = .041) predicted smoking. Buzz (beta = 2.88, p = .004) mediated the gender-smoking relationship. Moderators included negative social (beta = -0.45, p = .021) and enhance self-esteem (beta = -1.07, p = .024). CONCLUSION: Interventions might benefit from tailoring on gender differences in smoking-outcome expectancies.

Adolescent↗