From: Is maternal trait anxiety a risk factor for late preterm and early term deliveries?
 |  | Spontaneous deliveriesa | Provider-initiated deliveries | All deliveries | ||||||
---|---|---|---|---|---|---|---|---|---|---|
 | Gestation lengthb | Late preterm | Early term | Full term (reference) | Late preterm | Early term | Full term (reference) | Late preterm | Early term | Full term (reference) |
 | N | 1812 | 9701 | 56 527 | 1 007 | 4535 | 7824 | 2819 | 14054 | 64351 |
Unadjusted analyses | Â | OR (95% CI)c | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
Anxiety groupsd | Very high | 1.5 (1.1-2.0) | 1.3 (1.2-1.5) | - | 1.7 (1.2-2.3) | 1.3 (1.0-1.6) | - | 1.8 (1.4-2.2) | 1.4 (1.3-1.6) | - |
 | High | 1.2 (0.9-1.6) | 1.0 (0.9-1.2) | - | 0.9 (0.6-1.2) | 1.0 (0.9-1.3) | - | 1,2 (1.0-1.5) | 1.1 1.0-1.2) | - |
 | Low | 1.2 (1.1-1.4) | 1.1 (1.0-1.1) | - | 1.1 (1.0-1.3) | 1.1 (1.0-1.2) | - | 1.2 (1.2-1.4) | 1.1 (1.1-1.2) | - |
 | Very low (reference) | - | - | - | - | - | - | - | - | - |
Adjusted analyses | Â | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
Anxiety groups | Very high | 1.4 (1.0-1.8) | 1.3 (1.1-1.5) | - | 1.7 (1.2-2.4) | 1.3 (1.0-1.6) | - | 1.7 (1.3-2.0) | 1.4 (1.3-1.6) | - |
 | High | 1.1 (0.9-1.5) | 1.0 (0.9-1.1) | - | 0.9 (0.6-1.3) | 1.0 (0.9-1.3) | - | 1.1 (0.9-1-4) | 1.1 (1.0-1.2) | - |
 | Low | 1.2 (1.0-1.3) | 1.0 (1.0-1.1) | - | 1.1 (1.0-1.2) | 1.1 (1.0-1.2) | - | 1.2 (1.1-1.3) | 1.1 (1.1-1.2) | - |
 | Very low (reference) | - | - | - | - | - | - | - | - | - |