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Table 3 Comparisons of different levels of maternal stress for the odds (odds ratio and reciprocal) of having female versus male offspring at birth.

From: Mother's occupation and sex ratio 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
  1. 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.