State-trait anxiety inventory results (STAI)
| Outcome | MRI (n=206)* | Ultrasound (n=217)* | p Value |
| Primary outcome | |||
| Maternal state STAI at baseline (95% CI) | 36.81 (35.18 to 38.44) | 37.59 (36.00 to 39.18) | 0.02 |
| Maternal state STAI at 14 days (95% CI) | 32.77 (31.54 to 34.01) | 33.97 (32.78 to 35.17) | |
| Maternal state STAI at 12 months (95% CI) | 31.87 (30.63 to 33.12) | 33.43 (32.22 to 34.63) | |
| Maternal state STAI at 18–24 months corrected age (95% CI) | 31.82 (30.65 to 33.00) | 33.63 (32.49 to 34.77) | |
| Secondary outcomes | |||
| Maternal trait STAI at baseline (95% CI) | 37.02 (35.64 to 38.39) | 38.22 (36.86 to 39.58) | 0.56 |
| Maternal trait STAI at 14 days (95% CI) | 35.15 (34.03 to 36.27) | 34.77 (33.70 to 35.84) | |
| Maternal trait STAI at 12 months (95% CI) | 34.97 (33.83 to 36.10) | 35.38 (34.29 to 36.47) | |
| Maternal trait STAI at 18–24 months corrected age (95% CI) | 34.70 (33.64 to 35.77) | 35.77 (34.74 to 36.81) | |
| Paternal state STAI | MRI (n=168)† | Ultrasound (n=176)† | |
| Paternal state STAI at baseline (95% CI) | 34.47 (32.75 to 36.19) | 35.19 (33.50 to 36.89) | 0.78 |
| Paternal state STAI at 14 days (95% CI) | 32.43 (31.04 to 33.83) | 32.76 (31.43 to 34.10) | |
| Paternal state STAI at 12 months (95% CI) | 30.45 (29.01 to 31.88) | 31.29 (29.93 to 32.64) | |
| Paternal state STAI at 18–24 months corrected age (95% CI) | 31.92 (30.55 to 33.29) | 31.38 (30.06 to 32.70) | |
| Paternal trait STAI | MRI (n=168)‡ | Ultrasound (n=178)‡ | |
| Paternal trait STAI at baseline (95% CI) | 34.54 (33.12 to 35.95) | 35.24 (33.78 to 36.71) | 0.82 |
| Paternal trait STAI at 14 days (95% CI) | 33.15 (31.93 to 34.36) | 33.15 (32.00 to 34.31) | |
| Paternal trait STAI at 12 months (95% CI) | 32.10 (30.85 to 33.35) | 33.13 (31.95 to 34.31) | |
| Paternal trait STAI at 18–24 months corrected age (95% CI) | 33.43 (32.23 to 34.63) | 32.86 (31.72 to 34.01) | |
*Number of mothers with primary and secondary outcome data (STAI) in each group (MRI and ultrasound) at baseline, 14 days, 12 months and 18–24 months corrected age,
†Number of fathers with secondary outcome data (state STAI) in each group (MRI and ultrasound) at baseline, 14 days, 12 months and 18–24 months corrected age.
‡Number of fathers with secondary outcome data (trait STAI) in each group (MRI and ultrasound) at baseline, 14 days, 12 months and 18–24 months corrected age.