Number of Participants (%) | 3 months before the last menstrual period to the end of the first trimester | 1–2 months before the last menstrual period to the end of the first trimester | After the last menstrual period to the end of the first trimester | ||||
---|---|---|---|---|---|---|---|
N (%) | aOR (95% CI) | N (%) | aOR (95% CI) | N (%) | aOR (95% CI) | ||
All | 907,720 (100.00) | 350,738 (38.63) | 130,683 (14.40) | 200,894 (22.13) | |||
Age (years) | |||||||
21–30 | 359,024 (39.79) | 281,003 (38.06) | 1.000 | 106,988 (14.49) | 1.000 | 168,957 (22.88) | 1.000 |
21–39 | 375,056 (41.57) | 66,498 (41.29) | 1.08 (1.06,1.10) | 22,741 (14.12) | 1.00 (0.98,1.02) | 30,439 (18.90) | 0.87 (0.85,0.89) |
41–49 | 126,992 (14.07) | 3237 (38.49) | 0.89 (0.84,1.00) | 954 (11.34) | 0.73 (0.67,0.79) | 1498 (17.81) | 0.71 (0.66,0.76) |
Years of education | |||||||
≤ 6 | 38,456 (4.26) | 14,813 (38.5) | 1.000 | 6963 (18.11) | 1.000 | 7547 (19.63) | 1.000 |
7–11 | 574,818 (63.71) | 226,632 (39.4) | 0.88 (0.85,0.91) | 78,859 (13.72) | 0.73 (0.70,0.76) | 118,320 (20.58) | 0.92 (0.89,0.95) |
≥ 12 | 279,261 (30.95) | 106,679 (38.2) | 0.99 (0.96,1.02) | 43,904 (15.72) | 0.92 (0.88,0.96) | 72,368 (25.91) | 1.20 (1.16,1.25) |
Missing | 9735 (1.08) | 2614 (26.9) | 957 (9.83) | 2659 (27.31) | |||
Ethic | |||||||
others | 46,488 (5.15) | 16,449 (35.38) | 1.000 | 6878 (14.80) | 1.000 | 8330 (17.92) | 1.000 |
Han | 850,661 (94.28) | 333,497 (39.2) | 1.23 (1.16,1.27) | 123,334 (14.50) | 1.10 (1.05,1.15) | 190,933 (22.45) | 1.167 (1.12,1.21) |
Missing | 5121(0.57) | 792 (15.5) | 471 (9.14) | 1631 (31.84) | |||
Occupation | |||||||
farmer | 674,647 (74.77) | 267,151 (39.60) | 1.00 | 96,303 (14.27) | 1.00 | 142,011 (21.05) | 1.00 |
worker | 86,484 (9.59) | 32,617 (37.71) | 0.87 (0.84,0.90) | 11,748 (13.58) | 0.86 (0.83,0.90) | 21,092 (24.39) | 0.95 (0.92,0.98) |
others | 125,406 (13.90) | 46,375 (36.98) | 0.95 (0.93,0.98) | 20,767 (16.56) | 1.06 (1.02,1.10) | 33,628 (26.86) | 1.11 (1.07,1.15) |
Missing | 15,733 (1.74) | 4595 (29.21) | 1865 (11.85) | 4163 (26.46) | |||
Time at study recruitment | |||||||
2010 | 183,893 (20.26) | 71,601 (38.94) | 1.00 | 26,682 (14.51) | 1.00 | 35,848 (19.49) | 1.00 |
2011 | 436,761 (48.11) | 169,415 (38.79) | 1.21 (1.20,1.24) | 65,325 (15.00) | 1.22 (1.19,1.24) | 94,548 (21.65) | 1.34 (1.32,1.37) |
2012 | 287,175 (31.63) | 109,722 (38.21) | 1.21 (1.19,1.23) | 38,676 (13.47) | 1.03 (1.01,1.06) | 70,498 (24.55) | 1.45 (1.42,1.48) |
Per Capita Gross Regional Product | |||||||
low | 492,823 (54.62) | 198,539 (40.29) | 1.00 | 75,028 (15.22) | 1.00 | 104,872 (21.28) | 1.00 |
middle | 307,224 (34.05) | 108,850 (35.43) | 0.53 (0.53,0.54) | 40,969 (13.34) | 0.57 (0.56,0.58) | 72,710 (23.67) | 0.76 (0.74,0.77) |
high | 95,980 (10.64) | 38,202 (39.80) | 0.59 (0.57,0.61) | 14,053 (14.64) | 0.62 (0.59,0.64) | 22,944 (23.90) | 0.865 (0.832,0.9) |
higher | 6243 (0.69) | 5147 (82.44) | 20.75 (16.20,26.58) | 633 (10.14) | 4.15 (3.19,5.40) | 368 (5.89) | 2.16 (1.65,2.83) |
Per capita net income of farmer households | |||||||
low | 548,559 (60.80) | 214,258 (39.06) | 1.00 | 81,937 (14.94) | 1.00 | 119,288 (21.75) | 1.00 |
middle | 295,584 (32.76) | 110,123 (37.26) | 1.176 (1.15,1.201) | 39,603 (13.40) | 1.22 (1.18,1.25) | 67,602 (22.87) | 1.08 (1.06,1.11) |
high | 46,316 (5.13) | 22,448 (48.47) | 1.58 (1.50,1.67) | 5986 (12.92) | 1.52 (1.42,1.64) | 10,459 (22.58) | 1.85 (1.74,1.97) |
higher | 11,811 (1.31) | 3909 (33.10) | 1.24 (1.09,1.40) | 3157 (26.73) | 3.08 (2.67,3.55) | 3545 (30.01) | 2.51 (2.20,2.85) |
Per Capita Consumption Expenditure of Rural Households | |||||||
low | 694,268 (76.95) | 265,965 (38.31) | 1.00 | 102,820 (14.81) | 1.00 | 152,358 (21.95) | 1.00 |
middle | 183,353 (20.32) | 74,654 (40.72) | 1.23 (1.20,1.26) | 23,142 (12.62) | 0.89 (0.86,0.92) | 41,984 (22.90) | 0.95 (0.92,0.97) |
high | 24,550 (2.72) | 10,051 (40.94) | 1.87 (1.81,1.93) | 4720 (19.23) | 0.80 (0.73,0.87) | 6551 (26.68) | 0.91 (0.85,0.99) |
higher | 99 (0.01) | 68 (68.69) | – | 1 (1.01) | 0.02 (0.02,0.02) | 1 (1.01) | – |
Per Capita Cash Consumption Expenditure of Health Care and Medical Services of Rural Households | |||||||
low | 601,828 (66.70) | 234,989 (39.05) | 1.00 | 85,937 (14.28) | 1.00 | 129,945 (21.59) | 1.00 |
middle | 231,476 (25.65) | 85,046 (36.74) | 0.98 (0.97,1.00) | 33,865 (14.63) | 1.12 (1.10,1.15) | 56,783 (24.53) | 1.12 (1.10,1.14) |
high | 59,237 (6.57) | 27,359 (46.19) | 1.32 (1.30,1.37) | 8259 (13.94) | 1.13 (1.08,1.18) | 11,271 (19.03) | 0.67 (0.64,0.70) |
higher | 9729 (1.08) | 3344 (34.37) | 1.59 (1.40,1.82) | 2622 (26.95) | 2.17 (1.89,2.49) | 2895 (29.76) | 1.46 (1.28,1.67) |