Table 1.
Laboratory data and prevalence of anemia among Japanese adult women (n = 10,598).
| All | 20–24 years (n = 312) | 25–29 years (n = 604) | 30–34 years (n = 973) | 35–39 years (n = 1,901) | 40–44 years (n = 2,954) | 45–49 years (n = 3,854) | |
|---|---|---|---|---|---|---|---|
| N(%) or Mean ± SD | |||||||
| Hemoglobin (g/dL) | 12.82 ± 1.14 | 12.89 ± 0.92 | 12.83 ± 1.07 | 12.87 ± 1.00 | 12.85 ± 1.04 | 12.76 ± 1.16 | 12.82 ± 1.23 |
| <12 g/dL | 1,811 (17.1) | 45 (14.4) | 85 (14.1) | 133 (13.7) | 284 (14.9) | 551 (18.7) | 713 (18.5) |
| Type of anemia | |||||||
| Mild | 1,162 (11.0) | 34 (10.9) | 61 (10.1) | 93 (9.6) | 196 (10.3) | 351 (11.9) | 427 (11.1) |
| Moderate | 626 (5.9) | 11 (3.5) | 22 (3.6) | 39 (4.0) | 87 (4.6) | 192 (6.5) | 275 (7.1) |
| Severe | 23 (0.2) | 0 | 2 (0.3) | 1 (0.1) | 1 (0.1) | 8 (0.3) | 11 (0.3) |
| Current medical history of anemia | 184 (1.7) | 1 (0.3) | 4 (0.7) | 5 (0.5) | 18 (0.9) | 51 (1.7) | 105 (2.7) |
| Women with Hb < 12 g/dL and who had not self-reported a current medical history of anemia | 1,721 (16.2) | 45 (14.4) | 83 (13.7) | 131 (13.5) | 278 (14.6) | 523 (17.7) | 661 (17.2) |
Mild anemia: Hb 11.0 to 11.9 g/dL; moderate anemia: Hb 8.0 to 10.9 g/dL; severe anemia: Hb < 8.0 g/dL.