TABLE 5.
Unadjusted and adjusted a hazard ratios (HRs) for the association between 9 stressors individually and the rate of giving birth, in sub‐intervals of gestational age
| 27–33 weeks | 34–36 weeks | 37–38 weeks | 39–41 weeks | 42–45 weeks | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Unadjusted HR (95% CI) | Adjusted HR (95% CI) | Unadjusted HR (95% CI) | Adjusted HR (95% CI) | Unadjusted HR (95% CI) | Adjusted HR (95% CI) | Unadjusted HR (95% CI) | Adjusted HR (95% CI) | Unadjusted HR (95% CI) | Adjusted HR (95% CI) | |
| Financial troubles | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 1.20 (0.92, 1.58) | 1.17 (0.88, 1.57) | 0.85 (0.74, 0.97) | 0.85 (0.74, 0.98) | 1.04 (0.98, 1.10) | 1.04 (0.98, 1.10) | 1.00 (0.98, 1.03) | 0.99 (0.96, 1.02) | 1.08 (1.00, 1.16) | 1.06 (0.99, 1.15) |
| A lot | 0.83 (0.41, 1.66) | 0.72 (0.34, 1.54) | 0.91 (0.68, 1.21) | 0.89 (0.66, 1.21) | 1.08 (0.95, 1.22) | 1.05 (0.93, 1.19) | 1.04 (0.98, 1.11) | 1.05 (0.99, 1.12) | 0.97 (0.82, 1.15) | 0.97 (0.82, 1.14) |
| Housing situation | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 0.93 (0.65, 1.33) | 0.86 (0.59, 1.25) | 0.92 (0.79, 1.08) | 0.90 (0.76, 1.05) | 0.99 (0.93, 1.06) | 1.00 (0.93, 1.07) | 0.97 (0.94, 1.00) | 0.98 (0.95, 1.01) | 1.01 (0.93, 1.10) | 1.01 (0.93, 1.10) |
| A lot | 1.37 (0.87, 2.14) | 1.26 (0.79, 2.00) | 0.93 (0.74, 1.17) | 0.89 (0.70, 1.14) | 1.09 (0.99, 1.21) | 1.08 (0.98, 1.19) | 1.02 (0.97, 1.07) | 1.03 (0.98, 1.08) | 1.02 (0.90, 1.16) | 1.01 (0.88, 1.14) |
| Work situation | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 0.90 (0.71, 1.14) | 0.86 (0.68, 1.10) | 0.97 (0.88, 1.07) | 0.99 (0.90, 1.09) | 0.98 (0.94, 1.03) | 0.99 (0.94, 1.03) | 1.00 (0.98, 1.02) | 0.99 (0.97, 1.02) | 1.03 (0.98, 1.09) | 1.04 (0.98, 1.10) |
| A lot | 0.98 (0.70, 1.36) | 0.97 (0.69, 1.37) | 1.02 (0.88, 1.18) | 1.01 (0.87, 1.17) | 1.03 (0.96, 1.10) | 1.00 (0.94, 1.07) | 1.03 (1.00, 1.06) | 1.01 (0.98, 1.04) | 1.00 (0.92, 1.10) | 1.02 (0.93, 1.11) |
| Partner relationship | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 1.10 (0.77, 1.57) | 1.13 (0.78, 1.63) | 0.91 (0.77, 1.07) | 0.97 (0.82, 1.15) | 1.08 (1.01, 1.16) | 1.07 (1.00, 1.15) | 1.05 (1.01, 1.08) | 1.04 (1.00, 1.07) | 1.00 (0.90, 1.11) | 1.01 (0.91, 1.12) |
| A lot | 1.41 (0.76, 1.65) | 1.49 (0.76, 2.92) | 1.09 (0.81, 1.48) | 1.05 (0.74, 1.48) | 1.16 (1.01, 1.32) | 1.10 (0.95, 1.28) | 1.02 (0.95, 1.10) | 1.02 (0.95, 1.10) | 1.08 (0.92, 1.26) | 1.03 (0.87, 1.21) |
| Family and friends relationships | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 0.68 (0.43, 1.06) | 0.65 (0.41, 1.04) | 0.97 (0.82, 1.14) | 0.98 (0.83, 1.15) | 1.09 (1.02, 1.17) | 1.09 (1.01, 1.17) | 1.03 (1.00, 1.07) | 1.03 (0.99, 1.06) | 0.95 (0.86, 1.06) | 0.94 (0.85, 1.05) |
| A lot | 1.35 (0.67, 2.71) | 1.39 (0.69, 2.80) | 0.88 (0.60, 1.28) | 0.90 (0.61, 1.33) | 1.14 (0.98, 1.32) | 1.10 (0.94, 1.28) | 1.01 (0.94, 1.09) | 1.00 (0.93, 1.08) | 0.90 (0.71, 1.15) | 0.92 (0.71, 1.18) |
| Pregnancy worries | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 1.20 (0.98, 1.47) | 1.23 (1.00, 1.52) | 1.05 (0.97, 1.15) | 1.10 (1.00, 1.20) | 1.07 (1.03, 1.11) | 1.06 (1.02, 1.10) | 1.04 (1.02, 1.06) | 1.02 (1.00, 1.04) | 1.06 (1.01, 1.11) | 1.05 (1.00, 1.11) |
| A lot | 1.69 (1.30, 2.20) | 1.77 (1.34, 2.36) | 1.31 (1.16, 1.48) | 1.39 (1.22, 1.58) | 1.44 (1.37, 1.52) | 1.39 (1.31, 1.47) | 1.12 (1.09, 1.15) | 1.08 (1.05, 1.11) | 0.95 (0.87, 1.04) | 0.94 (0.86, 1.04) |
| Diseases of the mother | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 1.03 (0.78, 1.36) | 1.06 (0.80, 1.40) | 1.00 (0.89, 1.13) | 0.99 (0.88, 1.12) | 1.07 (1.02, 1.13) | 1.04 (0.98, 1.09) | 1.03 (1.00, 1.05) | 1.01 (0.99, 1.04) | 0.98 (0.91, 1.05) | 0.97 (0.90, 1.04) |
| A lot | 1.40 (0.97, 2.01) | 1.42 (0.98, 2.07) | 1.40 (1.20, 1.64) | 1.35 (1.14, 1.59) | 1.39 (1.30, 1.50) | 1.30 (1.21, 1.40) | 1.10 (1.06, 1.14) | 1.07 (1.03, 1.12) | 0.86 (0.76, 0.97) | 0.85 (0.75, 0.97) |
| Diseases of family and friends | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 0.88 (0.61, 1.27) | 0.93 (0.64, 1.35) | 0.86 (0.73, 1.01) | 0.93 (0.79, 1.09) | 0.98 (0.92, 1.05) | 0.97 (0.91, 1.04) | 0.99 (0.96, 1.03) | 0.98 (0.95, 1.01) | 1.03 (0.94, 1.13) | 1.03 (0.94, 1.13) |
| A lot | 1.28 (0.83, 1.99) | 1.31 (0.83, 2.05) | 0.97 (0.78, 1.20) | 1.06 (0.86, 1.32) | 1.09 (0.99, 1.19) | 1.06 (0.96, 1.16) | 1.01 (0.97, 1.05) | 0.99 (0.95, 1.04) | 1.01 (0.89, 1.14) | 1.00 (0.88, 1.13) |
| Other worries | ||||||||||
| No | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| A little | 0.72 (0.39, 1.35) | 0.76 (0.41, 1.43) | 0.88 (0.69, 1.12) | 0.90 (0.70, 1.15) | 1.05 (0.95, 1.16) | 1.04 (0.94, 1.15) | 1.00 (0.95, 1.05) | 0.99 (0.95, 1.04) | 1.06 (0.93, 1.20) | 1.05 (0.92, 1.19) |
| A lot | 1.67 (1.03, 2.71) | 1.51 (0.91, 2.53) | 1.03 (0.79, 1.34) | 1.03 (0.79, 1.35) | 1.14 (1.02, 1.28) | 1.09 (0.97, 1.23) | 1.12 (1.06, 1.18) | 1.11 (1.05, 1.18) | 0.98 (0.82, 1.15) | 0.97 (0.82, 1.16) |
a
Adjusted for mother's age, education level, having a partner, parity, fertility treatment, non‐communicable diseases, infections and the child's congenital anomalies.