Sarah M Wood1, Whitney Schott2, Michael P Marshal3, Aletha Y Akers4. 1. Craig Dalsimer Division of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; PolicyLab, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania. Electronic address: woodsa@email.chop.edu. 2. Population Studies Center, University of Pennsylvania, Philadelphia, Pennsylvania. 3. Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania. 4. Craig Dalsimer Division of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; PolicyLab, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Division of Obstetrics and Gynecology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.
Abstract
PURPOSE: We aimed to estimate group-based trajectories of body mass index (BMI) in a longitudinal cohort of young women and determine the association between sexual identity and BMI trajectory group, adjusting for obesity risk factors. METHODS: We analyzed data from females in waves I-IV of the National Longitudinal Study of Adolescent to Adult Health. Sexual identity was categorized as heterosexual, mostly heterosexual, bisexual, or lesbian (homosexual/mostly homosexual). We conducted group-based trajectory modeling of BMI with a censored normal distribution and a cubic relationship with age to identify three BMI trajectory groups. Multinomial logit regressions predicted the risk of trajectory membership associated with sexual identity, adjusting for background characteristics. RESULTS: At wave I, the mean (n = 7,801) age was 15.9 years (95% confidence interval: 15.6-16.1). Subjects were 16.3% African-American; and 80.0% heterosexual, 15.9% mostly heterosexual, 2.5% bisexual, and 1.7% lesbian. Group-based trajectory modeling identified three BMI trajectory groups characterized as (1) minimal obesity (62.2%), (2) developing obesity (29.9%), and (3) progressive obesity (8.0%). In multinomial logit regressions adjusted for age, race, parental obesity and education, sexual abuse, household income, screen time, depressive symptoms, and rural residence, lesbian women had a nearly two-fold higher relative risk of being in the developing obesity trajectory group (relative risk ratio = 1.91, 95% confidence interval: 1.10-3.32) relative to the minimal obesity group, compared with heterosexual women. CONCLUSIONS: Lesbian women were at increased risk of membership in the developing obesity trajectory group compared with heterosexual women. Adjusting for obesity risk factors had minimal impact on the point estimates for this association.
PURPOSE: We aimed to estimate group-based trajectories of body mass index (BMI) in a longitudinal cohort of young women and determine the association between sexual identity and BMI trajectory group, adjusting for obesity risk factors. METHODS: We analyzed data from females in waves I-IV of the National Longitudinal Study of Adolescent to Adult Health. Sexual identity was categorized as heterosexual, mostly heterosexual, bisexual, or lesbian (homosexual/mostly homosexual). We conducted group-based trajectory modeling of BMI with a censored normal distribution and a cubic relationship with age to identify three BMI trajectory groups. Multinomial logit regressions predicted the risk of trajectory membership associated with sexual identity, adjusting for background characteristics. RESULTS: At wave I, the mean (n = 7,801) age was 15.9 years (95% confidence interval: 15.6-16.1). Subjects were 16.3% African-American; and 80.0% heterosexual, 15.9% mostly heterosexual, 2.5% bisexual, and 1.7% lesbian. Group-based trajectory modeling identified three BMI trajectory groups characterized as (1) minimal obesity (62.2%), (2) developing obesity (29.9%), and (3) progressive obesity (8.0%). In multinomial logit regressions adjusted for age, race, parental obesity and education, sexual abuse, household income, screen time, depressive symptoms, and rural residence, lesbian women had a nearly two-fold higher relative risk of being in the developing obesity trajectory group (relative risk ratio = 1.91, 95% confidence interval: 1.10-3.32) relative to the minimal obesity group, compared with heterosexual women. CONCLUSIONS: Lesbian women were at increased risk of membership in the developing obesity trajectory group compared with heterosexual women. Adjusting for obesity risk factors had minimal impact on the point estimates for this association.
Authors: Michael P Marshal; Sarah S Dermody; Michelle L Shultz; Gina S Sucato; Stephanie D Stepp; Tammy Chung; Chad M Burton; Nina Markovic; Alison E Hipwell Journal: J Am Psychiatr Nurses Assoc Date: 2013-09-20 Impact factor: 2.385
Authors: Mark S Friedman; Michael P Marshal; Thomas E Guadamuz; Chongyi Wei; Carolyn F Wong; Elizabeth Saewyc; Ron Stall Journal: Am J Public Health Date: 2011-06-16 Impact factor: 9.308
Authors: Aletha Yvette Akers; Cheryl P Lynch; Melanie A Gold; Judy Chia-Chi Chang; Willa Doswell; Harold C Wiesenfeld; Wentao Feng; James Bost Journal: Pediatrics Date: 2009-10-19 Impact factor: 7.124
Authors: Laura Kann; Emily O'Malley Olsen; Tim McManus; William A Harris; Shari L Shanklin; Katherine H Flint; Barbara Queen; Richard Lowry; David Chyen; Lisa Whittle; Jemekia Thornton; Connie Lim; Yoshimi Yamakawa; Nancy Brener; Stephanie Zaza Journal: MMWR Surveill Summ Date: 2016-08-12