Table 3.
GLMM summaries for AFR and IBI as response variables
| Model 1. Age at First Reproduction (AFR) | Model 2. Interbirth Interval (IBI) | ||
|---|---|---|---|
| Response variable | AFR (years) | Response variable | IBI (months) |
| Fixed effects | Estimate (SE) | Fixed effects | Estimate (SE) |
| High-income (intercept) | 3.36*** (0.02) | Low-income (intercept) | 1.82*** (0.09) |
| Low-income | − 0.33*** (0.06) | Middle-income | 0.11 (0.09) |
| Middle-income | − 0.29*** (0.02) | Natural fertility | 0.15 (0.18) |
| Natural fertility | − 0.28** (0.11) | US WIC nonparticipants | 0.24 (0.15) |
| US WIC nonparticipant | − 0.003 (0.11) | US WIC participants | 0.32* (0.15) |
| US WIC participant | − 0.21 (0.11) | Age | 0.06*** (0.0007) |
| Random effects | SD | Random effects | SD |
| Population (intercept) | 0.02 | Population (intercept) | 0.08 |
| Residual | 0.19 | Residual | 0.58 |
*p < 0.05; **p < 0.01; ***p < 0.001