Table 3.
Multivariate associations of health-related characteristics and the difference between absolute MET estimates and perceived intensity-adjusted MET estimates over time (1996–2017) in the Study of Women’s Health Across the Nation.
| β (95% CI) | P | |
|---|---|---|
| Intercept | −28.6 (-46.7, −10.4) | 0.002 |
| Age, years | 0.7 (0.4, 1.0) | <0.001 |
| Race/ethnicity | ||
| Non-Hispanic white | REF | |
| African American | −0.03 (-7.9, 7.9) | 0.99 |
| Hispanic | 4.5 (-10.4, 19.5) | 0.55 |
| Chinese | 31.1 (19.8, 42.5) | <0.001 |
| Japanese | 13.7 (2.9, 24.4) | 0.01 |
| Education attainment | ||
| High school or less | 10.3 (1.6, 19.0) | 0.02 |
| Some college | 11.6 (4.4, 18.8) | 0.002 |
| College degree | REF | |
| Marital status | ||
| Married | REF | |
| Not married | 7.2 (0.3, 14.1) | 0.04 |
| Economic strain | ||
| Not difficult to pay for basics | REF | |
| Somewhat or very difficult | 1.5 (0.3, 14.1) | 0.04 |
| BMI, kg/m2 | 0.3 (-0.1, 0.7) | 0.15 |
| Smoking status | ||
| Non-smoker | REF | |
| Current smoker | 12.9 (5.0, 20.7) | 0.001 |
| Diabetes | ||
| No | REF | |
| Yes | 2.1 (-5.6, 9.7) | 0.59 |
| Osteoarthritis | ||
| No | REF | |
| Yes | 1.9 (-2.8, 6.6) | 0.43 |
| Physical functioning, SF-36 | −0.04 (-0.1, 0.1) | 0.44 |
| Depressive symptoms | ||
| No | REF | |
| Yes | 2.0 (-3.2, 7.2) | 0.45 |
Abbreviations: MET, metabolic equivalent of a task; HS, high school; BMI, body mass index; SF, the Medical Outcomes Study Short-Form 36; CI, confidence interval.
Notes: Age is centered at 42 years, the minimum age at baseline. β can be interpreted as change in the difference between absolute MET estimates and perceived intensity-adjusted MET estimates per 1-unit increase in the listed variables. MET values were assigned using the 2011 Compendium of Physical Activities. Intensity-adjusted MET categories were assigned using self-reported perceived exertion, measured with the survey question, When you did this activity, did your heart rate and breathing increase?