Table 3.
Comparisons of different levels of maternal stress for the odds (odds ratio and reciprocal) of having female versus male offspring at birth.
| Level1 | /Level2 | Odds Ratio | 95% CI of the odds ratio |
|---|---|---|---|
| 2 | 1 | 0.90 | 1.11 |
| 3 | 1 | 1.11 | 0.90 |
| 3 | 2 | 1.23 | 0.81 |
| 4 | 1 | 1.06 | 0.94 |
| 4 | 2 | 1.17 | 0.85 |
| 4 | 3 | 0.95 | 1.05 |
| 5 | 1 | 1.01 | 0.99 |
| 5 | 2 | 1.12 | 0.90 |
| 5 | 3 | 0.90 | 1.11 |
| 5 | 4 | 0.95 | 1.05 |
| 6 | 1 | 1.00 | 1.00 |
| 6 | 2 | 1.11 | 0.90 |
| 6 | 3 | 0.90 | 1.11 |
| 6 | 4 | 0.95 | 1.06 |
| 6 | 5 | 1.00 | 1.00 |
| 7 | 1 | 1.31 | 0.76 |
| 7 | 2 | 1.45 | 0.69 |
| 7 | 3 | 1.17 | 0.85 |
| 7 | 4 | 1.24 | 0.81 |
| 7 | 5 | 1.30 | 0.77 |
| 7 | 6 | 1.30 | 0.77 |
| 8 | 1 | 0.91 | 1.10 |
| 8 | 2 | 1.00 | 1.00 |
| 8 | 3 | 0.81 | 1.23 |
| 8 | 4 | 0.86 | 1.17 |
| 8 | 5 | 0.90 | 1.11 |
| 8 | 6 | 0.90 | 1.11 |
| 8 | 7 | 0.69 | 1.44 |
| 9 | 1 | 1.57 | 0.64 |
| 9 | 2 | 1.74 | 0.58 |
| 9 | 3 | 1.41 | 0.71 |
| 9 | 4 | 1.48 | 0.67 |
| 9 | 5 | 1.56 | 0.64 |
| 9 | 6 | 1.57 | 0.64 |
| 9 | 7 | 1.20 | 0.83 |
| 9 | 8 | 1.73 | 0.58 |
| 10 | 1 | 1.00 | 1.00 |
| 10 | 2 | 1.11 | 0.90 |
| 10 | 3 | 0.90 | 1.11 |
| 10 | 4 | 0.95 | 1.06 |
| 10 | 5 | 0.99 | 1.01 |
| 10 | 6 | 1.00 | 1.00 |
| 10 | 7 | 0.77 | 1.31 |
| 10 | 8 | 1.11 | 0.90 |
| 10 | 9 | 0.64 | 1.57 |
The data set includes information on all births collected between 2000 and 2005 by Addenbrooke's hospital in Cambridge, UK. Level 1 indicates the stress level level2 is compared to. Stress levels range from 1 (low) to 10 (highest). In this comparison stay-at-home mothers were in stress category 2 (low stress). CI = confidence interval.