Table 4 Associations between socioeconomic factors and number of mental disorders. IRR (95%CI), Coefficient (95%CI)

 Female

Reference

Reference

 Male

0.82***

0.81, 0.84

−0.27***

−0.29, −0.24

 4

Reference

Reference

 5

1.01

0.99, 1.03

−0.00

−0.03, 0.02

 7

1.22***

1.18, 1.26

0.25***

0.20, 0.30

 8

1.31***

1.27, 1.35

0.36***

0.31, 0.40

 Anhui

Reference

Reference

 Gansu

1.45***

1.42, 1.47

0.26***

0.16, 0.36

 Ningxia

1.63***

1.60, 1.67

0.43***

0.32, 0.53

 Qinghai

1.65***

1.60, 1.69

0.44***

0.34, 0.55

 Shaanxi

1.28***

1.25, 1.30

0.11**

0.00, 0.21

 Standardized index for household wealth

1.00***

1.00, 1.00

0.00

−0.00, 0.00

 Constant

1.20***

1.10, 1.30

 Log likelihood

−75,234.409

 R-squared

0.0212

 N

48,956

48,956