Table 3.
Trajectories of Body Mass Index by Social Support over the Whitehall II Study Phases 3 (1991-1994) – 11 (2012-2013), United Kingdom.
| Body Mass Index | ||||||
|---|---|---|---|---|---|---|
| Men (n=3,950) | Women (n=1,510) | |||||
| Model | Intercept β (SE) |
Linear slope β (SE) |
Nonlinear change β (SE) |
Intercept β (SE) |
Linear slope β (SE) |
Nonlinear change β (SE) |
| Basic growth model | 24.62 (0.05) | 0.212 (0.005) | −0.0054 (0.0002) | 24.91 (0.13) | 0.250 (0.011) | −0.0065 (0.0004) |
| M3: Emotional support | ||||||
| Tertile 1 (low) | −0.211 (0.136) | 0.024 (0.012)* | −0.0011 (0.0004)* | −0.347 (0.329) | 0.027 (0.028) | −0.0004 (0.0011) |
| Tertile 2 (medium) | −0.222 (0.139) | 0.020 (0.012) | −0.0010 (0.0004)* | −0.406 (0.325) | 0.028 (0.029) | −0.0004 (0.0011) |
| M3: Practical support | ||||||
| Tertile 1 (low) | −0.027 (0.143) | −0.005 (0.012) | −0.0001 (0.0005) | −0.515 (0.367) | −0.006 (0.030) | 0.0008 (0.0011) |
| Tertile 2 (medium) | −0.0005 (0.1322) | 0.012 (0.012) | −0.0008 (0.0004) | −0.601 (0.302) | 0.018 (0.032) | −0.0002 (0.0012) |
| M3: Negative aspects | ||||||
| Tertile 2 (medium) | −0.224 (0.129) | 0.007 (0.012) | −0.0009 (0.0004) | −0.181 (0.312) | 0.030 (0.027) | −0.0012 (0.0010) |
| Tertile 3 (high) | −0.042 (0.131) | 0.024 (0.012)* | −0.0008 (0.0004) | 0.196 (0.319) | −0.031 (0.027) | 0.0012 (0.0010) |
Reference: Tertile 3 (high emotional and practical support) and Tertile 1 (low negative aspects); SE, standard error; M2, Model 2; M3, Model 3.
Model 3 adjusts for: age at baseline, ethnicity, employment grade, longstanding illness, marital status, health behaviours and psychological wellbeing
*
P < 0.05
**
P < 0.01