The sex distribution in each area and group in those with complete data
| Sex | Complete data* | ||||||
| Zero | I | II | III | IV | Control | ||
| All area† | Boys | 297 | (836)1061 | (1174)1478 | 180 | (1492)1911 | (1414)1645 |
| Girls | 254 | (843)1053 | (1121)1410 | 203 | (1436)1889 | (1333)1561 | |
| Hamadori area | Boys | 145 | 351 | 460 | 26 | 573 | 477 |
| Girls | 115 | 328 | 420 | 32 | 558 | 392 | |
| Nakadori area† | Boys | 118 | (330)555 | (505)809 | 129 | (688)1107 | (732)963 |
| Girls | 116 | (371)581 | (508)797 | 144 | (680)1133 | (730)958 | |
| Aizu area | Boys | 34 | 155 | 209 | 25 | 231 | 205 |
| Girls | 23 | 144 | 193 | 27 | 198 | 211 | |
*The only data from group I, II, IV and control are used in this study.
†The number in brackets represents the number of children who were examined at birth. They are fewer than the number of other health examination periods because some data on height at birth were missing in Nakadori area.