Table 2 Proportion of PTSD by participants’ characteristics

Overall

684

63

9.2

Gender

0.002*

 Male

288

15

5.2

 Female

396

48

12.1

Marital status

0.588

 Single/divorced/widowed

176

18

10.2

 Married

508

45

8.9

Age (years)

<0.001*

 18-35

129

1

0.8

 36-59

300

29

9.7

 ≥60

255

33

12.9

Education level

0.001*

 Less than high school

566

62

11.0

 > = High school

118

1

0.8

Occupation

<0.001*

 Farmer

492

60

12.2

 Non-farmer

192

3

1.6

Ethnicity

0.209

 Han

377

30

8.0

 Qiang

307

33

10.7

Property loss

0.443

 Less(<10000 RMB/ 6135 USD)

110

8

7.3

 Large(> = 10000 RMB/ 6135 USD)

574

55

9.6

Family member died

0.025*

 No

426

31

7.3

 Yes

258

32

12.4

Family member injured

0.822

 No

602

56

9.3

 Yes

82

7

8.5

Injury to self

0.232

 No

659

59

9.0

 Yes

25

4

16.0