Table 3 Univariable analysis of probable PTSD by potential risk factors among elderly survivors six months after the Wenchuan earthquake (n = 427)
Variables | Subject, n(%) | Cut off score of 2 points on average | Cut off score of 33 total score | Cut off score of 35 total score | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
n(%) | X2 | P | n(%) | X2 | P | n(%) | X2 | P | ||
Age | ||||||||||
 60–79 | 376 (88.1) | 77 (20.5) | 2.115 | 0.146 | 149 (39.6) | 1.027 | 0.311 | 135 (35.9) | 0.212 | 0.645 |
  ≥ 80 | 51 (11.9) | 15 (29.4) |  |  | 24 (47.1) |  |  | 20 (39.2) |  |  |
Gender | ||||||||||
 Male | 230 (53.9) | 46 (20.0) | 0.703 | 0.402 | 89 (38.7) | 0.683 | 0.408 | 83 (36.1) | 0.010 | 0.921 |
 Female | 197 (46.1) | 46 (23.4) |  |  | 84 (42.6) |  |  | 72 (36.5) |  |  |
Marital status | ||||||||||
 Never married/divorced | 14 (3.3) | 2 (14.3) | 1.104 | 0.576 | 3 (21.4) | 2.252 | 0.324 | 3 (21.4) | 1.413 | 0.493 |
 Widowed | 97 (22.7) | 24 (24.7) |  |  | 41 (42.3) |  |  | 35 (36.1) |  |  |
 Married | 316 (74.0) | 66 (20.9) |  |  | 129 (40.8) |  |  | 117 (37.0) |  |  |
Education level | ||||||||||
 Elementary school or lower | 285 (66.7) | 69 (24.2) | 3.797 | 0.051 | 124 (43.5) | 3.340 | 0.068 | 114 (40.0) | 5.059 | 0.024 |
 Middle school | 131 (30.7) | 22 (16.8) |  |  | 46 (35.1) |  |  | 38 (29.0) |  |  |
 Senior high school or higher | 11 (2.6) | 1 (9.1) |  |  | 3 (27.3) |  |  | 3 (27.3) |  |  |
Suffered own injury | ||||||||||
 No injury | 378 (88.5) | 82 (21.7) | 0.042 | 0.837 | 150 (39.7) | 0.945 | 0.331 | 135 (35.7) | 0.487 | 0.485 |
 Injury | 49 (11.5) | 10 (20.4) |  |  | 23 (46.9) |  |  | 20 (40.8) |  |  |
Family members injured | ||||||||||
 No injury | 352 (82.4) | 81 (23.0) | 2.768 | 0.096 | 143 (40.6) | 0.008 | 0.928 | 131 (37.2) | 0.707 | 0.401 |
 Injury | 38 (8.9) | 7 (18.4) |  |  | 15 (39.5) |  |  | 12 (31.6) |  |  |
 Death | 37 (8.7) | 4 (10.8) |  |  | 15 (40.5) |  |  | 12 (32.4) |  |  |
House damage | ||||||||||
 Slightly | 84 (19.7) | 17 (20.2) | 0.106 | 0.745 | 28 (33.3) | 2.233 | 0.135 | 28 (33.3) | 0.397 | 0.529 |
 Almost completely | 343 (80.3) | 75 (21.9) |  |  | 145 (42.3) |  |  | 127 (37.0) |  |  |
Change in economic status | ||||||||||
 Improved | 12 (2.8) | 7 (58.3) | 0.036 | 0.849 | 8 (66.7) | 3.907 | 0.048 | 8 (66.7) | 2.407 | 0.121 |
 No change | 228 (53.4) | 43 (18.9) |  |  | 77 (33.8) |  |  | 69 (30.3) |  |  |
 Declined | 187 (43.8) | 42 (22.5) |  |  | 88 (47.1) |  |  | 78 (41.7) |  |  |
Number of family members living in the same home | ||||||||||
 0 | 151 (35.4) | 49 (32.5) | 16.38 | < 0.001 | 76 (50.3) | 10.210 | 0.001 | 69 (45.7) | 10.271 | 0.001 |
 1 | 113 (26.5) | 21 (18.6) |  |  | 44 (38.9) |  |  | 40 (35.4) |  |  |
  ≥ 2 | 163 (38.2) | 22 (13.5) |  |  | 53 (32.5) |  |  | 46 (28.2) |  |  |
Available measures to assess own health | ||||||||||
 0 | 134 (31.4) | 17 (12.7) | 9.336 | 0.002 | 42 (31.3) | 9.246 | 0.002 | 36 (26.9) | 9.168 | 0.002 |
 1 | 246 (57.6) | 61 (24.8) |  |  | 105 (42.7) |  |  | 96 (39.0) |  |  |
  ≥ 2 | 47 (11.0) | 14 (29.8) |  |  | 26 (55.3) |  |  | 23 (48.9) |  |  |
Chronic illnesses diagnosed | ||||||||||
 0 | 224 (52.5) | 29 (12.9) | 19.939 | < 0.001 | 64 (28.5) | 29.490 | < 0.001 | 56 (25.0) | 25.338 | < 0.001 |
 1 | 133 (31.2) | 40 (30.1) |  |  | 67 (50.4) |  |  | 63 (47.4) |  |  |
  ≥ 2 | 70 (16.4) | 23 (32.9) |  |  | 42 (60.0) |  |  | 36 (51.4) |  |  |