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TABLE 2—
Mean BMI and Prevalence of Overweight and Obesity in Sample of Nonpregnant US Women Aged 20–44 Years, by Sexual Orientation: National Survey of Family Growth, United States, 2002
| Sexual Orientation | |||||
| Weighta | Heterosexual Mean (95% CI) | Lesbian Mean (95% CI) | Bisexual Mean (95% CI) | Other Mean (95% CI) | P (Pairwise Testings)b |
| Normal, no. | 49.7 (47.3, 52.1) | 30.5 (18.3, 42.7) | 48.5 (39.3, 57.7) | 41.9 (34.0, 49.8) | .028 (L = .014) |
| Overweight, no. | 25.6 (24.0, 27.2) | 35.3 (23.7, 47.0) | 29.6 (20.6, 38.6) | 31.1 (23.5, 38.6) | |
| Obese, no. | 24.7 (22.7, 26.7) | 34.2 (21.3, 47.2) | 21.9 (14.8, 29.0) | 27.1 (20.7, 33.4) | |
| Mean BMI | 26.1 (25.8, 26.4) | 27.6 (26.1, 29.2) | 26.2 (25.4, 27.1) | 26.7 (25.8, 27.5) | .160 (L = .065) |
Note: BMI = body mass index; CI = confidence interval; L = lesbian.
aNormal weight is defined as BMI < 25 kg/m2, overweight as BMI = 25–29 kg/m2, and obese as BMI ≥ 30 kg/m2.
bP values were determined using the Rao-Scott χ2 test or the F test. Pairwise tests were for comparison of each sexual orientation category to the reference group (heterosexual).