Table 3 Logistic regression analysis of suicidal ideation and suicidal attempt by latent classes

Latent classes (class 2 as ref)

Class 1

6.59

4.42–9.81

5.13

3.38–7.78

Class 3

0.21

0.11–0.42

0.15

0.07–0.36

Class 4

2.12

1.25–3.62

2.13

1.25–3.65

Age

0.98

0.95–1.02

1.003

0.97–1.04

Sex

Women

ref

Men

0.60

0.26–1.40

1.35

0.64–2.82

Ethnic

Han

ref

Others

1.24

0.85–1.80

0.97

0.65–1.45

Marital status

Married

ref

Unmarried

0.58

0.37–0.91

1.20

0.73–1.96

Divorce/others

2.34

1.02–5.35

2.58

1.001–6.65

Residence

Rural

ref

Urban

1.17

0.76–1.81

1.06

0.68–1.67

Education level

High school or lower

ref

Bachelor degree or above

0.90

0.61–1.32

0.80

0.53–1.20

Only children

No

ref

Yes

0.85

0.51–1.42

0.82

0.47–1.41

Income (monthly)

3000 or lower

ref

3001–5000

1.28

0.81–2.02

1.12

0.70–1.80

5001–7000

1.64

0.88–3.06

1.05

0.54–2.03

7000 or higher

2.26

0.97–5.27

0.88

0.35–2.25

Nagelkerke R²

0.204

0.171

Model fit (Hosmer and lemeshow)

χ²  = 2.89, DF = 8, P = 0.941

χ²  = 3.46, DF = 8, P = 0.902