Table 4.
Multivariate logistic regression analyses of family factors for body weight gain in women
| Model 1 (⊿BMI> = 2.5 kg/m2) | Model 2 (⊿BMI> = 3.5 kg/m2) | |||||
|---|---|---|---|---|---|---|
| ORsa | 95% CIsa | p for trendb | ORsa | 95% CIsa | p for trendb | |
| Marital status | ||||||
| Unmarried | 0.31 | (0.17–0.58) | 0.29 | (0.13–0.65) | ||
| Married | 1.00 | (Ref) | 1.00 | (Ref) | ||
| Bereavement/Divorce | 0.77 | (0.52–1.29) | < 0.001 | 0.89 | (0.58–1.39) | 0.006 |
| Family structure | ||||||
| Single | 0.81 | (0.46–1.42) | 0.87 | (0.45–1.69) | ||
| Couple | 1.37 | (0.75–2.51) | 1.18 | (0.80–1.74) | ||
| Two generations | 1.00 | (Ref) | 1.00 | (Ref) | ||
| Three generations | 1.06 | (0.59–1.91) | 0.445 | 0.82 | (0.59–1.15) | 0.224 |
| Family relationships | ||||||
| Good | 1.00 | (Ref) | 1.00 | (Ref) | ||
| Somewhat good | 1.11 | (0.85–1.46) | 0.98 | (0.72–1.33) | ||
| ‘Not so good’/‘Not good’ | 1.86 | (1.25–2.79) | 0.009 | 1.62 | (1.02–2.56) | 0.120 |
| Pregnancy | ||||||
| Nothing | 0.46 | (0.29–0.74) | 0.38 | (0.21–0.68) | ||
| 1 time | 0.99 | (0.61–1.60) | 1.06 | (0.62–1.82) | ||
| > = 2 times | 1.00 | (Ref) | 0.003 | 1.00 | (Ref) | 0.004 |
| Childbirth | ||||||
| Nothing | 0.45 | (0.29–0.70) | 0.40 | (0.23–0.68) | ||
| 1 time | 1.28 | (0.84–1.95) | 1.53 | (0.96–2.43) | ||
| > = 2 times | 1.00 | (Ref) | 0.004 | 1.00 | (Ref) | 0.014 |
| Miscarriage | ||||||
| Nothing | 1.00 | (Ref) | 1.00 | (Ref) | ||
| 1 time | 1.05 | (0.68–1.61) | 1.03 | (0.64–1.68) | ||
| > =2 times | 1.30 | (0.71–2.40) | 0.429 | 0.70 | (0.33–1.47) | 0.490 |
CIs confidence intervals, ORs odds ratios, Ref reference
aORs and CIs were adjusted for age, BMI and physical activity (as continuous variables for the three variables), smoking status (never, ex- and smokers = 0, 1 and 2), habitual drinking (never, ex- and drinkers = 0, 1 and 2), feeling stressed (many times, normal and rare = − 1, 0 and 1) and education level (< 12, 12 and ≥ 12 = 0, 1 and 2)
bTrend association was assessed by assigning ordinal numbers (− 1, 0 and 1) to unmarried, married and ‘bereavement/divorce’ for marital status, those (0, 1, 2 and 3) to single, couple, two generations and three generations for family structure, those (0, 1 and 2) to the following four variables: good, somewhat good and ‘not so good/not good’ for family relationships, and for 0, 1 or 2 times of pregnancies, childbirth and miscarriages, respectively