Table 3 Risk ratios (RR) (95% CI) for neonatal mortality according to subgroups.
From: Maternal age and risk of early neonatal mortality: a national cohort study
Subgroups | Maternal age | Early neonatal mortality | ||
|---|---|---|---|---|
RR | 95% CI | |||
Obstetrically underserved area | ||||
Yes | ≤ 19 | 2.53 | 2.41 | 2.66 |
20–24 | 1.64 | 1.60 | 1.69 | |
25–29 | 1.00 | 0.98 | 1.01 | |
30–34 | 1.00 | |||
35–39 | 0.92 | 0.90 | 0.93 | |
≥ 40 | 1.21 | 1.16 | 1.25 | |
No | ≤ 19 | 1.26 | 1.19 | 1.33 |
20–24 | 1.21 | 1.18 | 1.24 | |
25–29 | 1.03 | 1.01 | 1.04 | |
30–34 | 1.00 | |||
35–39 | 0.89 | 0.88 | 0.90 | |
≥ 40 | 1.27 | 1.24 | 1.30 | |
Maternal educational level | ||||
High school or lower | ≤ 19 | 1.76 | 1.69 | 1.83 |
20–24 | 1.36 | 1.32 | 1.40 | |
25–29 | 1.19 | 1.17 | 1.22 | |
30–34 | 1.00 | |||
35–39 | 0.94 | 0.92 | 0.96 | |
≥ 40 | 1.03 | 1.00 | 1.07 | |
University or above | ≤ 19 | |||
20–24 | 1.39 | 1.35 | 1.43 | |
25–29 | 0.95 | 0.94 | 0.96 | |
30–34 | 1.00 | |||
35–39 | 0.87 | 0.86 | 0.88 | |
≥ 40 | 1.53 | 1.49 | 1.56 | |
Year of delivery | ||||
2011 | ≤ 19 | 1.60 | 1.47 | 1.73 |
20–24 | 1.61 | 1.54 | 1.67 | |
25–29 | 1.10 | 1.07 | 1.12 | |
30–34 | 1.00 | |||
35–39 | 0.98 | 0.95 | 1.00 | |
≥ 40 | 1.41 | 1.35 | 1.47 | |
2012 | ≤ 19 | 2.65 | 2.49 | 2.83 |
20–24 | 1.70 | 1.64 | 1.76 | |
25–29 | 1.35 | 1.32 | 1.37 | |
30–34 | 1.00 | |||
35–39 | 0.93 | 0.91 | 0.95 | |
≥ 40 | 1.64 | 1.59 | 1.70 | |
2013 | ≤ 19 | 1.50 | 1.38 | 1.64 |
20–24 | 1.02 | 0.97 | 1.07 | |
25–29 | 0.84 | 0.82 | 0.86 | |
30–34 | 1.00 | |||
35–39 | 0.91 | 0.89 | 0.93 | |
≥ 40 | 1.25 | 1.20 | 1.31 | |
2014 | ≤ 19 | 2.33 | 2.17 | 2.51 |
20–24 | 1.49 | 1.43 | 1.55 | |
25–29 | 0.74 | 0.72 | 0.76 | |
30–34 | 1.00 | |||
35–39 | 0.79 | 0.77 | 0.81 | |
≥ 40 | 1.15 | 1.10 | 1.20 | |
2015 | ≤ 19 | – | ||
20–24 | 1.15 | 1.10 | 1.21 | |
25–29 | 1.10 | 1.07 | 1.12 | |
30–34 | 1.00 | |||
35–39 | 0.91 | 0.88 | 0.93 | |
≥ 40 | 0.81 | 0.77 | 0.85 | |
