Community-Based Screening for Infantile Anemia in an Okinawan Village, Japan

Table 1

Characteristics of infants in the Okinawan village, Japan.

Cross sectional survey	3–5 months	6–12 months	16–23 months
𝑛	942	898	980
Male (%)	471 (50%)	443 (49.3%)	478 (48.8%)
Mean birth weight ± SD g	3026±425	2993±438	2999±442
Mean gestational age ± SD week	38.9±1.7	38.8±1.8	38.8±1.7
Mean maternal age ± SD years	29.7±5.4	30.3±5.4	31.2±3.5
Mean Hb ± SD g/L	121±11	120±11	124±9
Birth order (%)
1	441 (46.8%)	431 (48.0%)	442 (45.1%)
2	284 (30.1%)	271 (30.2%)	284 (29.0%)
3	217 (23.1%)	196 (21.8%)	254 (25.9%)
Feeding method at screening (%)
Breast-fed	237 (25.2%)	151 (16.8%)
Mixed-fed	334 (35.5%)	158 (17.6%)
Formula-fed	371 (39.4%)	589 (65.5%)
Cohort study
n	511
Male (%)	237 (46.4%)
Mean birth weight ± SD g	3023±429
Mean gestational age ± SD week	38.8±1.7
Mean maternal age ± SD years	30.1±5.5
Mean Hb ± SD g/L	121±10	120±11	125±9
Birth order (%)
1	252 (49.3%)
2	142 (30.1%)
3	117 (22.9%)
Feeding method at screening (%)
Breast-fed	109 (21.3%)	79 (15.5%)
Mixed-fed	210 (41.1%)	80 (15.7%)
Formula-fed	192 (37.6%)	352 (68.9%)