Table 5 Prevalence of anemia in different characteristics among women of reproductive age, stratified by the history of childbirth in 2014–2018, southwest China
| Â | Without history of childbirth | With history of childbirth | ||||||
|---|---|---|---|---|---|---|---|---|
Number | Anemia,n(%) | cOR(95%CI) | aOR a (95%CI) | Number | Anemia,n(%) | cOR(95%CI) | aOR a (95%CI) | |
All participants | 253,906 | 46,062(18.1) | - | - | 386,766 | 75,192(19.4) | - | - |
Stage | ||||||||
 Non-pregnancy | 113,575 | 17,957(15.8) | 1.00 | 1.00 | 238,405 | 43,236(18.1) | 1.00 | 1.00 |
 First trimester | 126,543 | 26,705(21.1) | 1.42(1.40,1.45) | 1.41(1.38,1.44) | 141,471 | 31,178(22.0) | 1.28(1.26,1.30) | 1.27(1.25,1.29) |
 Third trimester | 13,788 | 1400(10.2) | 0.60(0.57,0.64) | 0.77(0.72,0.81) | 6890 | 778(11.3) | 0.58(0.53,0.62) | 0.69(0.64,0.75) |
Age group, years | ||||||||
 18–20 | 32,301 | 7907(24.5) | 1.60(1.55,1.65) | 1.37(1.33,1.41) | 22,491 | 5100(22.7) | 1.23(1.18,1.27) | 1.21(1.17,1.25) |
 21–25 | 119,045 | 21,490(18.1) | 1.04(1.01,1.06) | 0.98(0.96,1.01) | 104,029 | 21,230(20.4) | 1.06(1.03,1.08) | 1.05(1.03,1.07) |
 26–30 | 79,903 | 12,537(15.7) | 1.00 | 1.00 | 131,163 | 25,040(19.1) | 1.00 | 1.00 |
 31–35 | 16,388 | 2921(17.8) | 1.07(1.02,1.13) | 1.18(1.12,1.24) | 73,847 | 13,770(18.6) | 0.95(0.93,0.98) | 0.99(0.96,1.01) |
 > 35 | 6269 | 1207(19.3) | 1.17(1.10,1.25) | 1.25(1.17,1.33) | 55,236 | 10,052(18.2) | 0.93(0.91,0.95) | 1.00(0.98,1.03) |
Occupation | ||||||||
 Worker | 30,935 | 3767(12.2) | 1.00 | 1.00 | 20,342 | 3397(16.7) | 1.00 | 1.00 |
 Farmer | 204,768 | 40,130(19.6) | 1.76(1.70,1.82) | 1.76(1.70,1.82) | 352,070 | 69,437(19.7) | 1.23(1.18,1.27) | 1.13(1.09,1.17) |
 Others | 18,203 | 2165(11.9) | 0.97(0.92,1.03) | 0.97(0.92,1.03) | 14,354 | 2358(16.4) | 0.98(0.93,1.04) | 0.99(0.93,1.05) |
Ethnic | ||||||||
 Han | 171,560 | 28,353(16.5) | 1.00 | 1.00 | 242,186 | 41,944(17.3) | 1.00 | 1.00 |
 Others | 253,906 | 17,709(21.5) | 1.38(1.36,1.41) | 1.28(1.26,1.31) | 144,580 | 33,248(23.0) | 1.43(1.40,1.45) | 1.39(1.37,1.41) |