Table 3.
Univariate and multivariate linear regression models for work ability index (WAI), according to socio-demographics characteristics, body mass index (BMI), physical activity, smoking status, and other selected variables. Italy, 2017.
| Variables | Univariate | Multivariate | ||
|---|---|---|---|---|
| β | (95% CI) | β | (95% CI) | |
| Sex | ||||
| Men | Ref. | − | Ref. | − |
| Women | −0.266 | (−0.528, −0.003) | −0.187 | (−0.472, 0.010) |
| Age: years | −0.072 | (−0.086, −0.058) | −0.067 | (−0.083, −0.050) |
| Education level a | ||||
| Low | Ref. | − | Ref. | − |
| Medium | 0.868 | (−0.001, 1.738) | 0.855 | (−0.008, 1.719) |
| High | 1.757 | (0.878, 2.635) | 1.381 | (0.504, 2.257) |
| Marital status b | ||||
| Married | Ref. | − | Ref. | − |
| Single | 0.173 | (−0.153, 0.499) | −0.326 | (−0.737, 0.084) |
| Divorced | −0.504 | (−1.002, −0.005) | −0.352 | (−0.840, 0.136) |
| Widowed | −1.174 | (−2.313, −0.036) | −0.509 | (−1.621, 0.603) |
| Physical activity: frequency | ||||
| None | Ref. | − | Ref. | − |
| Occasional or 1 time/week | 0.706 | (0.355, 1.057) | 0.491 | (0.143, 0.838) |
| ≥2 times/week | 0.774 | (0.477, 1.072) | 0.504 | (0.206, 0.802) |
| Body mass index—BMI: kg/m2 | −0.005 | (−0.017, 0.007) | −0.005 | (−0.017, 0.006) |
| Smoking status | ||||
| Never | Ref. | − | Ref. | − |
| Former | −0.011 | (−0.503, 0.481) | 0.200 | (−0.282, 0.681) |
| Current | −0.064 | (−0.413, 0.285) | 0.058 | (−0.288, 0.403) |
| Offspring | ||||
| No | Ref. | − | Ref. | − |
| Yes | −0.188 | (−0.471, 0.095) | 0.240 | (−0.112, 0.593) |
| Dependent family members | ||||
| No | Ref. | − | Ref. | − |
| Yes | −0.798 | (−1.551, −0.046) | −0.637 | (−1.375, 0.101) |
| Commuter | ||||
| No | Ref. | − | Ref. | − |
| Yes | 0.204 | (−0.095, 0.503) | 0.155 | (−0.138, 0.448) |
| Part-time job | ||||
| No | Ref. | − | Ref. | − |
| Yes | −0.767 | (−1.113, −0.420) | −0.761 | (−1.134, −0.389) |
a Low education level includes primary and secondary schools, medium education level includes high and professional schools, high education level includes bachelor and master degrees. b Analysis conducted on 2057 subjects because of missing values.