Factors associated with the intent to have a second child among 11 991 women of childbearing age
| Factor | n (%) | Intent | Univariate model | Multivariate model | ||
| To have a second child (n (%)) | cORs (95% CI) | P value | aORs (95% CI) | P value | ||
| Total | 11 991 | 4725 (39.4) | ||||
| Year | ||||||
| 2016 | 3647 (30.4) | 1316 (36.1) | 1 | 1 | ||
| 2017 | 8344 (69.6) | 3409 (40.9) | 1.22 (1.13 to 1.33) | <0.001 | 1.31 (1.17 to 1.48) | <0.001 |
| Age (years) | ||||||
| <25 | 2748 (22.9) | 556 (20.2) | 1 | 1 | ||
| 25–29 | 3151 (26.3) | 1308 (41.5) | 2.80 (2.49 to 3.15) | <0.001 | 1.28 (1.10 to 1.50) | 0.002 |
| 30–34 | 2588 (21.6) | 1390 (53.7) | 4.57 (4.05 to 5.16) | <0.001 | 1.30 (1.09 to 1.55) | 0.004 |
| 35–39 | 1812 (15.1) | 900 (49.7) | 3.89 (3.41 to 4.43) | <0.001 | 1.29 (1.15 to 1.44) | 0.016 |
| ≥40 | 1692 (14.1) | 571 (33.7) | 2.01 (1.75 to 2.30) | <0.001 | 0.99 (0.82 to 1.19) | 0.902 |
| Region | ||||||
| Eastern | 8422 (70.2) | 3275 (38.9) | 1.23 (1.07 to 1.41) | 0.004 | 1.28 (1.10 to 1.49) | 0.001 |
| Central | 2582 (21.5) | 1113 (43.1) | 1.46 (1.25 to 1.70) | <0.001 | 1.50 (1.27 to 1.78) | <0.001 |
| Western | 987 (8.2) | 337 (34.1) | 1 | 1 | ||
| Ethnicity | ||||||
| Han | 11 651 (97.2) | 4595 (39.4) | 1 | |||
| Other | 340 (2.8) | 130 (38.2) | 0.95 (0.76 to 1.19) | 0.654 | ||
| Residence | ||||||
| Rural | 4595 (38.3) | 1974 (43.0) | 1.27 (1.18 to 1.37) | <0.001 | 1.62 (1.47 to 1.78) | <0.001 |
| Urban | 7396 (61.7) | 2751 (37.2) | 1 | 1 | ||
| Educational level | ||||||
| Primary school or below | 109 (0.9) | 36 (33.0) | 1 | |||
| Junior high school | 1632 (13.6) | 746 (45.7) | 1.71 (1.13 to 2.57) | 0.011 | ||
| Senior high school | 1088 (9.1) | 493 (45.3) | 1.68 (1.11 to 2.55) | 0.015 | ||
| College or higher | 9162 (76.4) | 3450 (37.7) | 1.22 (0.82 to 1.83) | 0.322 | ||
| Marriage | ||||||
| Single | 4441 (37.0) | 941 (21.2) | 1 | 1 | ||
| Married | 7550 (63.0) | 3784 (50.1) | 3.74 (3.43 to 4.07) | <0.001 | 1.74 (1.50 to 2.02) | <0.001 |
| Occupation | ||||||
| Factory worker | 1614 (13.5) | 710 (44.0) | 1 | 1 | ||
| Farmer | 300 (2.5) | 176 (58.7) | 1.81 (1.41 to 2.32) | <0.001 | 1.43 (1.09 to 1.88) | 0.010 |
| Manager | 3323 (27.7) | 1432 (43.1) | 0.96 (0.86 to 1.09) | 0.551 | 1.07 (0.94 to 1.22) | 0.323 |
| Rural migrant worker | 1392 (11.6) | 681 (48.9) | 1.22 (1.06 to 1.41) | 0.007 | 1.11 (0.95 to 1.30) | 0.200 |
| Clerk | 1714 (14.3) | 594 (34.7) | 0.68 (0.59 to 0.78) | <0.001 | 0.86 (0.71 to 1.03) | 0.103 |
| Student | 1592 (13.3) | 240 (15.1) | 0.23 (0.19 to 0.27) | <0.001 | 0.63 (0.51 to 0.79) | <0.001 |
| Other | 2056 (17.1) | 892 (43.4) | 0.98 (0.86 to 1.11) | 0.714 | 1.02 (0.88 to 1.18) | 0.806 |
| Annual household income (RMB) | ||||||
| <30 000 | 3650 (30.4) | 1151 (31.5) | 1 | 1 | ||
| 30 000–80 000 | 4406 (36.7) | 1847 (41.9) | 1.57 (1.43 to 1.72) | <0.001 | 0.99 (0.88 to 1.10) | 0.798 |
| >80 000 | 3935 (32.8) | 1727 (43.9) | 1.70 (1.55 to 1.87) | <0.001 | 1.13 (1.00 to 1.28) | 0.047 |
| History of abortion | ||||||
| No | 10 073 (84.0) | 3758 (37.3) | 1 | 1 | ||
| Yes | 1918 (16.0) | 967 (50.4) | 1.71 (1.55 to 1.88) | <0.001 | 1.18 (1.05 to 1.31) | 0.004 |
| First child | ||||||
| Boy | 3639 (30.3) | 1811 (49.8) | 3.47 (3.16 to 3.80) | <0.001 | 2.70 (2.33 to 3.13) | <0.001 |
| Girl | 3091 (25.8) | 1745 (56.5) | 4.54 (4.12 to 5.00) | <0.001 | 3.65 (3.14 to 4.24) | <0.001 |
| None | 5261 (43.9) | 1169 (22.2) | 1 | 1 | ||
| Barriers to having more children | ||||||
| Economic barrier | 5576 (46.5) | 2110 (37.8) | 0.65 (0.56 to 0.76) | <0.001 | 0.37 (0.31 to 0.43) | <0.001 |
| Health barrier | 1862 (15.5) | 731 (39.3) | 0.69 (0.59 to 0.82) | <0.001 | 0.39 (0.32 to 0.47) | <0.001 |
| Childrearing barrier | 2040 (17.0) | 794 (38.9) | 0.68 (0.58 to 0.81) | <0.001 | 0.32 (0.27 to 0.39) | <0.001 |
| Educational barrier | 1752 (14.6) | 723 (41.3) | 0.75 (0.64 to 0.90) | <0.001 | 0.38 (0.32 to 0.46) | <0.001 |
| Other | 761 (6.3) | 367 (48.2) | 1 | 1 | ||
aOR, adjusted odds ratio; cOR, crude odds ratio;RMB, renminbi.