Characteristics of the participants
| Boys | Girls | ||
|---|---|---|---|
| n=31 238 | n=29 032 | p Value | |
| Disaster experience (n, %) | 426 (1.4) | 414 (1.4) | 0.5 |
| House destroyed (n, %) | 170 (0.5) | 172 (0.6) | 0.4 |
| Tsunami (n, %) | 90 (0.3) | 117 (0.4) | 0.02 |
| Fire (n, %) | 1 (0.003) | 0 | 1.0 |
| Moving house (n, %) | 78 (0.3) | 83 (0.3) | 0.4 |
| Living in an evacuation centre (n, %) | 89 (0.3) | 103 (0.4) | 0.1 |
| Death in the family (n, %) | 16 (0.05) | 13 (0.04) | 0.7 |
| Others (n, %) | 146 (0.5) | 122 (0.4) | 0.4 |
| Disease prevalence (n, %) | 4136 (13.2) | 2948 (10.2) | <0.0001 |
| Atopic dermatitis (n, %) | 1165 (3.7) | 898 (3.1) | <0.0001 |
| Asthma (n, %) | 1303 (4.2) | 727 (2.5) | <0.0001 |
| Heart disease (n, %) | 129 (0.4) | 126 (0.4) | 0.7 |
| Kidney disease (n, %) | 27 (0.09) | 13 (0.04) | 0.047 |
| Other diseases (n, %) | 2054 (6.6) | 1483 (5.1) | <0.0001 |
| Allergy | 660 (2.1) | 416 (1.4) | <0.0001 |
| Kawasaki disease | 94 (0.3) | 57 (0.2) | 0.01 |
| Total developmental disorder | 127 (0.4) | 58 (0.2) | <0.0001 |
| Epilepsy | 61 (0.2) | 59 (0.2) | 0.9 |
| Others | 1095 (3.5) | 878 (3.0) | 0.0009 |