Table 1.
Hemoglobin concentration and anemia prevalence for childbearing women from the China National Nutrition and Health Survey 2010–2012.
| Variables | N(%) | Weighted Hemoglobin (g/L)1 | P 2 | Weighted prevalence (%, 95%CI) | P 3 |
|---|---|---|---|---|---|
| Total | 28,289 | 136.2(126.6–145.0) | 15.0(14.3–15.7) | ||
| Age group | <0.0001 χ2 = 19.21 |
0.001 F = 6.62 |
|||
| 18–29 years old | 5370(19.0) | 136.5(127.4–145.2)a | 13.4(12.0–14.8)b | ||
| 30–39 years old | 9034(31.9) | 135.8(126.0–144.2)b | 16.3(15.2–17.4)a | ||
| 40–49 years old | 13,885(49.1) | 136.4(126.4–145.3)a | 15.5(14.6–16.4)a | ||
| Region type | <0.0001 χ2 = 125.29 |
0.058 F = 2.49 |
|||
| Large cities | 5607(19.8) | 137.6(127.4–145.6)a | 13.3(11.8–14.7)b | ||
| Small and medium-sized cities | 7962(28.1) | 134.7(125.6–142.9)b | 15.8(14.6–17.0)a | ||
| Ordinary rural areas | 8895(31.5) | 137.4(127.7–146.4)a | 14.3(13.3–15.4)a | ||
| Poor rural areas | 5825(20.6) | 138.5(128.5–148.5)c | 14.9(13.4–16.4)a | ||
| Ethnicity | <0.0001 χ2 = 116.96 |
0.208 F = 1.59 |
|||
| Han | 24,596(86.9) | 136.0(126.3–144.6) | 15.1(14.4–15.8) | ||
| Other | 3693(13.1) | 139.0(129.4–148.1) | 13.8(12.1–15.6) | ||
| Latitude | <0.0001 χ2 = 162.18 |
0.057 F = 3.62 |
|||
| North | 12,872(45.5) | 136.4(126.3–145.9) | 15.8(14.6–16.9) | ||
| South | 15,417(54.5) | 136.0(126.8–144.3) | 14.4(13.6–15.2) | ||
| Season | <0.0001 χ2 = 56.03 |
<0.0001 F = 29.40 |
|||
| Spring | 1236(4.4) | 130.9(116.7–142.4)a | 30.3(25.4–35.2)a | ||
| Summer | 3098(11.0) | 135.2(125.0–144.4)b | 17.9(15.7–20.2)b | ||
| Autumn | 19,314(68.3) | 136.8(127.6–145.4)c | 13.5(12.7–14.3)c | ||
| Winter | 4641(16.4) | 135.0(125.5–143.5)b | 16.5(14.7–18.3)b | ||
| BMI4 level | <0.0001 χ2=108.37 |
0.957 F = 0.04 |
|||
| BMI < 24 | 17161(60.6) | 135.8(126.4–144.4)a | 15.0(14.1–15.9) | ||
| 24 ≤ BMI < 28 | 8196(29.0) | 137.0(126.9–146.0)b | 14.8(13.6–16.0) | ||
| BMI ≥ 28 | 2932(10.4) | 137.0(127.6–146.9)b | 15.2(13.0–17.3) | ||
| Education | <0.0001 χ2=49.63 |
0.002 F = 6.49 |
|||
| Primary school | 8709(30.8) | 136.6(126.8–146.2)a | 15.7(14.5–16.8)a | ||
| Middle school | 16,280(57.5) | 136.1(126.3–144.8)b | 15.3(14.4–16.2)a | ||
| College and above | 3300(11.7) | 136.2(127.6–143.7)b | 11.8(10.0–13.5)b | ||
| Smoke habits | <0.0001 χ2=19.63 |
0.048 F = 3.91 |
|||
| Smoke daily | 513(1.8) | 139.7(129.0–150.4) | 10.8(7.2–14.4) | ||
| No or occasionally | 27,776(98.2) | 136.2(126.5–145.0) | 15.0(14.4–15.7) | ||
| Annual family income (yuan) | <0.0001 χ2=34.91 |
0.005 F = 3.34 |
|||
| <10000 | 13,637(48.2) | 136.2(126.3–145.3)b | 16.2(15.1–17.2)a | ||
| 10,000–19,999 | 8156(28.8) | 136.5(126.9–145.0)a | 13.6(12.5–14.8)b | ||
| 20,000–29,999 | 2770(9.8) | 136.1(127.8–143.8)ac | 13.1(11.1–15.1)b | ||
| 30,000–39,999 | 978(3.5) | 134.2(125.2–142.2)ac | 16.2(12.5–19.8)ab | ||
| 40,000– | 1026(3.6) | 136.5(127.0–144.4)a | 13.0(10.0–16.0)ab | ||
| Not answer | 1722(6.1) | 136.8(126.0–145.0) 4 | 15.0(12.2–17.7)4 | ||
1. P50 (P25–P75), all such values; 2 P value for the Kruskal–Wallis test. 3 P value for theRao-scott testt; 4 BMI-Body mass index; 4 Not included in subgroups’ comparison. abc significant differences between subgroups.