Table 1.
Univariate Poisson regression results of postearthquake depression tendency (PDT)
| Overall (n=438) | PDT (n=163) | Non-PDT (n=275) | p Value* | Univariate analysis† | |||
| PR | 95% CI | ||||||
| Predisaster variables | |||||||
| Age | Median (range) | 73.6 (66–89) | 74.2 (66–89) | 73.2 (66–88) | 0.041 | 1.03 | 1.00 to 1.06 |
| Gender | Female | 262 (59.8)‡ | 108 (66.3) | 154 (56.0) | 0.035 | 1.42 | 1.02 to 1.98 |
| BMI | Mean±SD | 24.1±3.4 | 24.4±3.5 | 23.9±3.4 | 0.246 | 1.03 | 0.98 to 1.08 |
| Medical history | |||||||
| Hypertension | Yes | 195 (44.5) | 76 (46.6) | 119 (43.3) | 0.551 | 1.23 | 0.86 to 1.77 |
| Heart disease | Yes | 38 (8.7) | 15 (9.2) | 23 (8.4) | 0.861 | 1.08 | 0.56 to 2.08 |
| Diabetes | Yes | 24 (5.5) | 16 (9.8) | 8 (2.9) | 0.004 | 2.75 | 1.56 to 4.85 |
| Osteoporosis | Yes | 11 (2.5) | 5 (3.1) | 6 (2.2) | 0.547 | 1.83 | 0.73 to 4.58 |
| Stroke | Yes | 13 (3.0) | 4 (2.5) | 9 (3.3) | 0.861 | 1.04 | 0.33 to 3.31 |
| IADL§ | Mean±SD | 2.5±0.8 | 2.4±0.9 | 2.6±0.7 | 0.013 | 0.74 | 0.60 to 0.91 |
| Risk as determined by Basic Checklist (BCL) | |||||||
| Physical domain¶ | Deteriorate | 56 (12.8) | 27 (16.6) | 29 (10.5) | 0.076 | 1.47 | 0.86 to 2.51 |
| Nutrition domain** | Deteriorate | 1 (0.2) | 1 (0.6) | 0 (0.0) | 0.372 | – | – |
| Oral function†† | Deteriorate | 41 (9.4) | 18 (11.0) | 23 (8.4) | 0.397 | 1.12 | 0.63 to 2.00 |
| Homeboundness | Deteriorate | 60 (13.7) | 27 (16.6) | 33 (12.0) | 0.197 | 1.46 | 0.90 to 2.38 |
| Cognitive function‡‡ | Deteriorate | 131 (29.9) | 63 (38.7) | 68 (24.7) | 0.002 | 1.64 | 1.13 to 2.38 |
| Social activities§§ | Deteriorate | 76 (17.4) | 36 (22.1) | 40 (14.5) | 0.050 | 1.69 | 1.09 to 2.61 |
| Postdisaster variables | |||||||
| Evacuation site | Rental housing | 242 (55.3) | 101 (62.0) | 141 (51.3) | 0.037 | 1.42 | 1.03 to 1.95 |
| Social activities§§ | Deteriorate | 93 (21.2) | 48 (29.4) | 45 (16.4) | 0.002 | 2.63 | 1.76 to 3.93 |
*The χ2 test was used for categorical variables; Student’s t-test was used for continuous variables.
†Univariate analysis performed with objective (response) value taken as depression tendency occurrence=1 and non-depression tendency occurrence=0.
‡No. of persons (%).
§Range and IADL score is 0 (poor) to 3(favourable).
¶‘Deteriorate’ when ≧3 of 5 items apply.
**‘Deteriorate’ when 2 of 2 items apply.
††‘Deteriorate’ when ≧2 of 3 items apply.
‡‡‘Deteriorate’ when ≧1 of 3 items apply.
§§‘Deteriorate’ when ≧1 of 2 items apply.
BMI, body mass index; IADL, instrumental activities of daily living; PDT, presence of depression tendency; PR, prevalence ratio.