Table 2.
Cross-model regression results
| Model 1 |
Model 2 |
Model 3 |
Model 4 |
|
|---|---|---|---|---|
| β (SE) | β (SE) | β (SE) | β (SE) | |
| Working hours per day | −0.063 (0.058) | 0.058∗∗ (0.019) | 0.054∗∗ (0.018) | |
| Working days per week | −0.672∗∗∗ (0.155) | 0.088 (0.05) | 0.02 (0.049) | |
| Night-shift days per week | −0.558∗∗∗ (0.104) | 0.23∗∗∗ (0.036) | 0.157∗∗∗ (0.034) | |
| Sleep quality | −0.106∗∗∗ (0.008) | −0.096∗∗∗ (0.009) | ||
| Sex | 0.657 (0.396) | 0.017 (0.13) | 0.14 (0.124) | 0.084 (0.123) |
| Age | 0.017 (0.022) | −0.02∗∗ (0.007) | −0.027∗∗∗ (0.007) | −0.024∗∗∗ (0.007) |
| Education attainment | −0.294∗∗∗ (0.089) | 0.082∗∗ (0.029) | 0.042 (0.028) | 0.05 (0.028) |
| Marital status | ||||
| Single | Ref. | Ref. | Ref. | Ref. |
| Married | −0.329 (0.378) | 0.032 (0.122) | −0.007 (0.118) | 0.035 (0.116) |
| Other | −0.756 (0.621) | 0.054 (0.212) | −0.031 (0.204) | 0.012 (0.201) |
| Number of kids | 0.271 (0.21) | 0.057 (0.068) | 0.119 (0.065) | 0.082 (0.064) |
| Monthly income | 0.529∗∗∗ (0.124) | −0.077 (0.04) | 0.04 (0.037) | −0.002 (0.038) |
| Financial status | 0.303∗∗∗ (0.05) | −0.008 (0.017) | 0.002 (0.017) | 0.016 (0.016) |
| Household type (ref.) | ||||
| Local urban | Ref. | Ref. | Ref. | Ref. |
| Local rural | −0.856 (0.447) | 0.043 (0.141) | −0.082 (0.134) | −0.071 (0.132) |
| Nonlocal urban | −0.534 (0.41) | −0.163 (0.131) | −0.224 (0.125) | −0.245∗ (0.123) |
| Nonlocal rural | −0.562 (0.383) | −0.348∗∗ (0.123) | −0.399∗∗∗ (0.117) | −0.416∗∗∗ (0.116) |
| Years working as a gig driver | −0.401∗∗∗ (0.103) | 0.151∗∗∗ (0.036) | 0.151∗∗∗ (0.035) | 0.132∗∗∗ (0.034) |
| Whether having other income sources | ||||
| No | Ref. | Ref. | Ref. | Ref. |
| Yes | −0.433 (0.267) | −0.064 (0.089) | −0.126 (0.085) | −0.121 (0.084) |
| Type of gig worker | ||||
| Platform employed | Ref. | Ref. | Ref. | Ref. |
| Crowdsourced | −0.197 (0.29) | −0.084 (0.098) | −0.247∗∗ (0.094) | −0.148 (0.094) |
| Other | −0.41 (0.283) | 0.183∗ (0.093) | 0.072 (0.089) | 0.108 (0.088) |
| Contract type | ||||
| No contract signed | Ref. | Ref. | Ref. | Ref. |
| Standard labor contract | 0.395 (0.376) | 0.273∗ (0.126) | 0.242∗ (0.12) | 0.308∗ (0.12) |
| Labor service contract | 0.242 (0.328) | 0.196 (0.113) | 0.104 (0.108) | 0.174 (0.109) |
| Independent contractor | 0.14 (0.362) | 0.096 (0.125) | 0.119 (0.12) | 0.129 (0.119) |
| Social insurance | ||||
| No | Ref. | Ref. | Ref. | Ref. |
| Yes | −0.088 (0.28) | 0.295∗∗ (0.095) | 0.233∗ (0.091) | 0.262∗∗ (0.09) |
Note: ∗∗∗p < 0.001, ∗∗p < 0.01, ∗p < 0.05. SE = Standard Error. Model 1 is the OLS regression on sleep quality with three main predictors and covariates. Model 2 is the negative binomial regression on the number of occupational injuries with three main predictors and covariates. Model 3 is the negative binomial regression on the number of occupational injuries with sleep quality and covariates. Model 4 is the negative binomial regression on the number of occupational injuries with three main predictors, sleep quality, and covariates.
OLS, ordinary least squares.