Factors associated with the intent to have a second child in the multivariate models stratified by parity
| Characteristics | Multivariate models | |||
| Parity=0 | Parity≥1 | |||
| aOR (95% CI) | P value | aOR (95% CI) | P value | |
| Year | ||||
| 2016 | 1 | 1 | ||
| 2017 | 1.26 (1.03 to 1.54) | 0.023 | 1.36 (1.18 to 1.57) | <0.001 |
| Age (years) | ||||
| <25 | 1 | 1 | ||
| 25–29 | 1.26 (1.06 to 1.50) | 0.008 | 0.74 (0.48 to 1.13) | 0.163 |
| 30–34 | 1.16 (0.90 to 1.49) | 0.263 | 2.22 (1.41 to 3.45) | 0.001 |
| 35–39 | 0.70 (0.47 to 1.04) | 0.075 | 1.96 (1.25 to 3.13) | 0.003 |
| ≥40 | 0.50 (0.30 to 0.84) | 0.009 | 1.33 (1.00 to 1.79) | 0.050 |
| Region | ||||
| Eastern | 1.22 (1.06 to 1.42) | 0.007 | 1.31 (1.16 to 1.49) | <0.001 |
| Central | 1.28 (0.98 to 1.67) | 0.070 | 1.29 (1.07 to 1.55) | 0.008 |
| Western | ||||
| Ethnicity | ||||
| Han | 1 | 1 | ||
| Other | 0.94 (0.67 to 1.34) | 0.743 | 0.73 (0.51 to 1.04) | 0.080 |
| Residence | ||||
| Rural | 1.22 (1.06 to 1.41) | 0.007 | 1.99 (2.27 to 1.74) | <0.001 |
| Urban | 1 | 1 | ||
| Educational level | ||||
| Primary school or below | 1 | 1 | ||
| Junior high school | 1.20 (0.78 to 1.85) | 0.397 | 1.20 (0.78 to 1.84) | 0.415 |
| Senior high school | 1.30 (0.84 to 2.01) | 0.246 | 1.29 (0.83 to 2.00) | 0.252 |
| College or higher | 0.93 (0.61 to 1.41) | 0.723 | 0.91 (0.60 to 1.39) | 0.674 |
| Marriage | ||||
| Single | 1 | 1 | ||
| Married | 1.43 (1.20 to 1.71) | <0.001 | 1.56 (1.17 to 2.08) | 0.002 |
| Occupation | ||||
| Factory worker | 1 | 1 | ||
| Farmer | 1.10 (0.60 to 2.01) | 0.762 | 1.36 (0.98 to 1.89) | 0.068 |
| Manager | 1.31 (1.01 to 1.70) | 0.039 | 1.03 (0.88 to 1.21) | 0.734 |
| Rural migrant worker | 1.04 (0.77 to 1.40) | 0.803 | 1.07 (0.88 to 1.30) | 0.487 |
| Clerk | 0.95 (0.68 to 1.34) | 0.783 | 0.85 (0.68 to 1.07) | 0.165 |
| Student | 0.75 (0.56 to 1.00) | 0.050 | 0.21 (0.04 to 1.18) | 0.076 |
| Other | 1.22 (0.94 to 1.58) | 0.134 | 1.02 (0.86 to 1.22) | 0.809 |
| Annual household income (RMB) | ||||
| <30 000 | 1 | 1 | ||
| 30 000–80 000 | 1.01 (0.85 to 1.21) | 0.888 | 0.95 (0.82 to 1.10) | 0.485 |
| >80 000 | 1.17 (0.95 to 1.44) | 0.140 | 1.12 (0.95 to 1.31) | 0.171 |
| History of abortion | ||||
| No | 1 | 1 | ||
| Yes | 1.81 (1.33 to 2.45) | <0.001 | 1.11 (0.99 to 1.25) | 0.076 |
| Barriers to having more children | ||||
| Economic barrier | 0.68 (0.50 to 0.93) | 0.016 | 0.69 (0.58 to 0.82) | <0.001 |
| Health barrier | 0.96 (0.78 to 1.19) | 0.714 | 0.83 (0.72 to 0.95) | 0.007 |
| Childrearing barrier | 0.83 (0.68 to 0.99) | 0.049 | 0.97 (0.84 to 1.14) | 0.727 |
| Education barrier | 0.92 (0.75 to 1.13) | 0.431 | 0.68 (0.50 to 0.93) | 0.016 |
| Other | 1 | 1 | ||
aOR, adjusted odds ratio; RMB, renminbi.