1.
Differences Between Women by 11-Week Interview Status1*
| Variables | Full Interview n=661 Mean (SD) | Mini-Interview n=70 Mean (SD) | Incomplete or No Interview n=86 Mean (SD) | Significance of F Test Using ANOVA or t Test† (P Value) |
| Continuous | ||||
| Age, years | 30 (5.3) | 28.4 (5.6) | 27.9 (5.8) | F = 7.86 (.000) |
| Preconception general health score | 3.1 (0.8) | 3.0 (0.7) | 3.0 (0.9) | NS |
| Postpartum health at 11 weeks | ||||
| Mental health (MCS) score | 50.4 (7.3) | 50.3 (8.3) | – | NS |
| Physical health (PCS) score | 55.7 (5.2) | 54.5 (8.7) | – | NS |
| Discrete | Frequency (%) | Frequency (%) | Frequency (%) | |
| White | 568 (86) | 49 (70) | 64 (74) | χ2 = 17.1; df 2 (.000) |
| Earned a college degree | 318 (48) | 18 (26) | 18 (21) | χ2 = 32.6; df 2 (.000) |
| Meets poverty threshold | 81 (12) | 10 (14) | 17 (20) | NS |
| Prenatal mood problems | 307 (46) | 36 (51) | 42 (49) | NS |
| Primiparous | 301 (46) | 31 (44) | 38 (44) | NS |
| Employment (11 weeks) | ||||
| Unemployed | 0 | 40 (57) | – | NS2‡ |
| On leave | 334 (51) | 11 (16) | – | |
| Working | 327 (49) | 19 (27) | – | |
MCS = mental component summary from the SF-12; PCS = physicial component summary from the SF-12.
Note: Variables not significantly different between all 3 groups included the proportion of women by marital status, primiparous, and those who had cesarean deliveries; these findings are not reported in the table for purposes of brevity.
* The dashes indicate that no data was available for the subjects at the relevant time period because they did not do an interview at 5 and or 11 weeks after childbirth.
† The t test was used to evaluate differences in mean MCS and PCS scores between women completing the full interview and those completing the mini interview.
‡ The χ2 test was used to evaluate the difference in status as at work or on leave among employed women by interview status as full vs mini-interview. Women completing the mini-interview because they were unemployed were excluded from the analysis.