Table 2 Descriptive table of the total and single item scores in the General Health Questionnaire 12 (GHQ-12) based on the bimodal and the Likert scoring method and their association with the results at the International Trauma Questionnaire (ITQ) assessing the presence of post-traumatic stress disorder (PTSD)

q1

39.0%

55.9%

26.8%

< 0.001

1.40 (0.88)

1.66 (0.96)

1.21 (0.77)

< 0.001

q2

55.3%

71.2%

43.9%

0.001

1.55 (1.09)

1.95 (1.01)

1.26 (1.05)

< 0.001

q3

39.0%

45.8%

34.1%

0.160

1.35 (0.86)

1.47 (1.02)

1.26 (0.72)

< 0.001

q4

22.7%

30.5%

17.1%

0.060

0.99 (0.80)

1.05 (0.95)

0.95 (0.66)

< 0.001

q5

66.0%

83.1%

53.7%

< 0.001

1.82 (0.87)

2.12 (0.77)

1.60 (0.87)

< 0.001

q6

48.2%

61.0%

39.0%

0.010

1.46 (0.95)

1.69 (0.90)

1.29 (0.95)

< 0.001

q7

52.5%

74.6%

36.6%

< 0.001

1.65 (0.85)

2.05 (0.84)

1.35 (0.74)

< 0.001

q8

28.4%

35.6%

23.2%

0.107

1.13 (0.84)

1.22 (1.00)

1.06 (0.71)

< 0.001

q9

46.8%

55.9%

40.2%

0.065

1.33 (0.97)

1.46 (1.07)

1.23 (0.88)

< 0.001

q10

33.3%

47.5%

23.2%

0.003

1.02 (0.98)

1.25 (1.06)

0.85 (0.89)

< 0.001

q11

10.6%

16.9%

6.1%

0.040

0.43 (0.76)

0.56 (0.93)

0.34 (0.59)

0.853

q12

41.1%

57.6%

29.3%

< 0.001

1.36 (0.92)

1.63 (1.02)

1.17 (0.80)

< 0.001

Total

Mean (sd)

4.8 (3.4)

6.4 (3.2)

3.7 (3.1)

< 0.001

15.5 (6.8)

18.1 (7.2)

13.6 (5.9)

< 0.001