Table 4 The result of logistic regression analysis of associated factors of premarital pregnancy
From: Association of premarital pregnancy with adverse birth outcomes and its characteristics in Japan
Characteristics | Adjusted OR (95% CI) | p-value |
|---|---|---|
Maternal age group | ||
19 years or less | 117.36 (109.38, 125.92) | < 0.001 |
20–24 years | 13.02 (12.58, 13.47) | < 0.001 |
25–29 years | 1.75 (1.70, 1.81) | < 0.001 |
30–34 years | Reference | |
35–39 years | 1.13 (1.08, 1.18) | < 0.001 |
40 years or more | 1.25 (1.16, 1.34) | < 0.001 |
Household occupation | ||
Farmer | 1.86 (1.69, 2.05) | < 0.001 |
Self-employed | 1.94 (1.86, 2.03) | < 0.001 |
Full-time worker at a smaller company | 1.52 (1.48, 1.56) | < 0.001 |
Full-time worker at a larger company | Reference | |
Other occupations | 1.71 (1.64, 1.77) | < 0.001 |
Unemployed | 3.97 (3.64, 4.33) | < 0.001 |
Maternal occupation | ||
Upper non-manual workers | Reference | |
Lower non-manual workers | 1.11 (1.07, 1.16) | < 0.001 |
Manual workers | 1.09 (1.01, 1.19) | 0.026 |
Others | 1.18 (1.13, 1.22) | < 0.001 |
Paternal occupation | ||
Upper non-manual workers | Reference | |
Lower non-manual workers | 1.37 (1.33, 1.41) | < 0.001 |
Manual workers | 1.50 (1.45, 1.55) | < 0.001 |
Others | 1.45 (1.39, 1.52) | < 0.001 |
Year | ||
2010 | Reference | |
2015 | 1.12 (1.09, 1.15) | < 0.001 |
2020 | 1.03 (1.00, 1.06) | 0.053 |