Table 2 Subgroup analyses of the incidence of PTSD after earthquakes^aIncidence rates were obtained using a random-effects model

Total

60

23.66 (19.34–28.27)

<0.001

99.5

Assessment time after earthquake

<0.001

≤9 months

28

28.76 (22.28–35.71)

<0.001

99.5

>9 months

32

19.48 (14.09–25.50)

<0.001

99.5

Gender

<0.001

Male

26

22.57 (16.53–29.23)

<0.001

98.8

Female

29

34.82 (26.85–43.24)

<0.001

99.3

Educational level

<0.001

Elementary school or below

13

31.56 (21.22–42.90)

<0.001

99.1

Beyond elementary school

29

19.76 (14.33–25.82)

<0.001

99.3

Marital status

0.069

Married

7

25.61 (13.74–439.68)

<0.001

99.0

Unmarried

7

22.74(12.23–35.32)

<0.001

97.2

Damage to one’s house

<0.001

Yes

6

38.49 (25.11–52.82)

<0.001

98.2

No

6

23.97 (8.08–44.81)

<0.001

99.3

Bereavement

<0.001

Yes

12

39.10 (25.74–53.33)

<0.001

98.5

No

10

19.92 (10.89–30.83)

<0.001

99.2

Injury of body

<0.001

Yes

6

23.28 (13.91–34.16)

<0.001

96.4

No

5

9.63 (3.62–18.09)

<0.001

98.2

Witnessed death

<0.001

Yes

3

26.28 (7.05–52.14)

<0.001

98.8

No

3

14.69 (0.06–41.35)

<0.001

99.3