Table 2.
Associations of Current BMI and Obesity History With Total Daily Log-Activity Counts at Age 60–64
| Mean Difference in Total Daily Log-Activity Counts (95% CI) | |||||
| Model Adjusted for: | 1: Sex | 2: Sex and Socioeconomic Factors | 3: Sex and Health Status | 4: All Covariates in Models 2 and 3 | 5: All Covariates in Model 4 Plus Current BMI* |
| Current BMI (kg/m2) [N = 1,388] | |||||
| <25.0† | 0 | 0 | 0 | 0 | — |
| 25.0–29.9 | −91.4 (−194.9, 12.2) | −91.4 (−194.8, 12.0) | −77.8 (−180.4, 24.9) | −79.4 (−182.0, 23.2) | |
| 30.0–34.9 | −282.9 (−406.9, −159.0) | −284.6 (−408.6, −160.7) | −228.8 (−353.2, −104.4) | −232.0 (−356.6, −107.4) | |
| ≥35.0 | −671.6 (−844.5, −498.6) | −669.3 (−843.4, −495.2) | −570.1 (−744.7, −395.4) | −581.7 (−757.2, −406.3) | |
| p-Value for overall association | <.01 | <.01 | <.01 | <.01 | |
| Age first obese (y) [N = 1,115] | |||||
| Never | 0 | 0 | 0 | 0 | 0 |
| 60–64 | −200.6 (−371.1, −30.0) | −204.1 (−375.2, −33.0) | −149.9 (−320.2, 20.4) | −155.4 (−326.6, 15.7) | 45.2 (−150.9, 241.3) |
| 53 | −261.1 (−412.8, −109.4) | −255.9 (−407.6, −104.1) | −225.5 (−377.3, −73.6) | −225.4 (−377.3, −73.5) | 10.2 (−179.4, 199.8) |
| 43 | −449.9 (−658.7, −241.2) | −439.7 (−648.6, −230.8) | −364.1 (−576.5, −151.8) | −360.6 (−573.1, −148.2) | −62.0 (−318.3, 194.4) |
| 26 or 36 | −524.4 (−740.8, −308.0) | −518.4 (−739.5, −297.3) | −398.8 (−620.3, −177.3) | −413.1 (−638.1, −188.2) | −27.2 (−319.3, 264.9) |
| p-Value for trend | <.01 | <.01 | <.01 | <.01 | .71 |
Notes: BMI = body mass index; CI = confidence interval. Model 1: adjusted for sex (tests of sex interaction, p = .23 [current BMI]; 0.41 [obesity history]). Model 2: sex, occupational class, and work status. Model 3: sex, long-term limiting illness, symptoms of anxiety and depression, cardiovascular disease, and diabetes. Model 4: adjusted for all covariates in models 2 and 3.
*Effect estimate per 1 kg/m2 increase in BMI adjusted for obesity history and other covariates (N = 1,115): −34.0 (−50.6, −17.4).
†See Supplementary Table S5 for results from sensitivity analyses excluding those seven participants with BMI <18.5 kg/m2.