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Table 1 Comparison of Individual characteristics between subjects interviewed (n = 284) and unreachable (n = 567)

From: Recovery from post-traumatic stress disorder after a flood in China: a 13-year follow-up and its prediction by degree of collective action

Individual characteristics

Interviewed

Unreachable

χ 2

P

Number

%

Number

%

Gender

      

 Male

153

53.9

278

49.0

1.776

0. 183

 Female

131

46.1

289

51.0

Age

      

 29-57

174

61.3

423

74.6

16.071

0.000

 58-81

110

38.7

144

25.4

Education Level

      

 Elementary school or below

131

46.1

231

40.7

2.246

0.134

 Middle school or above

153

53.9

336

59.3

Flood-related stressors

      

 0

118

41.5

278

49.0

4.384

0.112

 1

69

24.3

125

22.0

 ≥2

97

34.2

164

28.9

Frequency of General Collective Action in 2000

      

 Never

62

21.8

152

26.8

2.491

0.288

 Occasionally

118

41.5

220

38.8

 Actively

104

36.6

195

34.4