Table 4.
Prospective relationshipa between baseline (2003–2005) RI and changes in BMI between baseline and follow-up (2007–2009) in the MrOS Study.
| RI | Changes in BMI (kg/m2) | ||||
|---|---|---|---|---|---|
| Mean (SD)b | Model I | Model II | |||
| β (95% Cl) | p value | β (95% Cl) | p value | ||
| Q1 | −0.28 (1.64) | −0.15 (−0.31, 0.01) | 0.07 | −0.12 (−0.29 to 0.04) | 0.15 |
| Q2 | −0.11 (1.35) | 0.04 (−0.12, 0.20) | 0.64 | 0.05 (−0.11, 0.21) | 0.53 |
| Q3 | −0.15 (1.47) | −0.04 (−0.20, 0.11) | 0.59 | −0.03 (−0.19, 0.12) | 0.68 |
| Q4 | −0.07 (1.15) | Ref. | Ref. | ||
| Continuousa | −0.16 (1.45) | 0.03 (−0.01, 0.07) | 0.18 | 0.02 (−0.02, 0.06) | 0.32 |
Abbreviations: BMI = body-mass index; CI = confidence interval; MrOS = The Osteoporotic Fractures in Men Study; RI = rhythm index. Model I: adjusted for baseline age and site.
Model II: additionally adjusted for race, education, smoking status, and alcohol use at baseline.
a
Expressed as beta coefficient obtained from multiple linear regression models, representing adjusted differences for each quartile of RI (Q1-Q3) when compared with the reference (Q4).
b
Mean and SD were calculated based on participants in each quartile of the RI and β and 95% CI were calculated as per 0.1 increase in RI.