Table 3.
Ordinary least square regression model identifying significant factors of short birth interval in Bangladesh, BDHS 2017/18.
| Variable category | Coefficient | Standard error | t-statistics | Probability | Robust standard-error | Robust t-statistics | Robust probability | VIF |
|---|---|---|---|---|---|---|---|---|
| Women’s age at first birth, ≤ 19 years | 1.05 | 0.09 | 32.24 | < 0.01 | 0.05 | 36.14 | < 0.01 | 3.40 |
| Women’s age at first birth, 20–34 years | 0.92 | 0.06 | 29.12 | < 0.01 | 0.03 | 34.12 | < 0.01 | 1.95 |
| Husbands did not receive formal education | 1.13 | 0.23 | 41.12 | < 0.01 | 0.07 | 42.34 | < 0.01 | 3.12 |
| Women not engaged in formal work | 0.78 | 0.12 | 23.17 | < 0.01 | 0.06 | 25.12 | < 0.01 | 2.98 |
| Gave birth to three or more children | 0.34 | 0.07 | 21.12 | < 0.01 | 0.03 | 14.12 | < 0.01 | 1.93 |
| The child born from the second most pregnancy died | 0.41 | 0.06 | 7.00 | < 0.01 | 0.04 | 6.00 | < 0.01 | 1.40 |
| Intercept | 0.11 | 0.02 | 2.97 | < 0.01 | 0.1 | 1.94 | < 0.01 | – |
| Model diagnostics | ||||||||
| Number of observation (clusters) | 672 | Akaike’s Information Criterion (AIC) | − 988.13 | |||||
| Multiple R-squared | 0.62 | Adjusted R-squared | 0.62 | |||||
| Joint F-Statistics | 1824.14 | Probability (> F), (6672) degrees | < 0.01 | |||||
| Joint Wald Statistics | 158.13 | Probability (> chi-squared), (6) degrees of freedom | < 0.01 | |||||
| Koenker (BP) Statistics | 1892.14 | Probability (> chi-squared), (6) degrees of freedom | < 0.01 | |||||
| Jarque–Bera Statistics | 0.86 | Probability (> chi-squared), (6) degrees of freedom | < 0.01 | |||||