Table 4.
Influence of the evacuation on prevalence of polycythemia in relation to smoking and obesity
| Before | After | p* | ||||
|---|---|---|---|---|---|---|
| n | Number of polycythemia (%) | Number of polycythemia (%) | ||||
| Total | Evaculation (-) | 3,272 | 26 (0.79) | 38 (1.16) | 0.10 | |
| Evaculation (+) | 7,446 | 66 (0.89) | 115 (1.54) | <0.001 | ||
| Obese | + | Evaculation (-) | 945 | 10 (1 .06) | 1 5 (1.59) | 0.36 |
| Evaculation (+) | 2,364 | 35 (1 .48) | 58 (2.45) | <0.01 | ||
| - | Evaculation (-) | 2,327 | 6 (0.69) | 23 (0.99) | 0.23 | |
| Evaculation (+) | 5,082 | 31(0.61) | 57 (1.12) | <0.001 | ||
| Smoking | + | Evaculation (-) | 335 | 4 (1.19) | 6 (1.79) | 0.50 |
| Evaculation (+) | 953 | 18 (1 .89) | 35 (3.67) | 0 < 0.01 | ||
| - | Evaculation (-) | 2,973 | 22 (0.75) | 32 (1.09) | 0.16 | |
| Evaculation (+) | 6,493 | 48 (0.74) | 80 (1.23) | <0.001 |
*McNemar’s test for comparing changes in the prevalence of polycythemia in the evacuee and non—evacuee group before and after the earthquake.