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Table 2 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 0.94 1.07
3 1 1.12 0.89
3 2 1.20 0.83
4 1 1.05 0.95
4 2 1.12 0.89
4 3 0.94 1.07
5 1 0.98 1.02
5 2 1.05 0.95
5 3 0.87 1.14
5 4 0.93 1.07
6 1 0.99 1.01
6 2 1.06 0.94
6 3 0.88 1.13
6 4 0.94 1.06
6 5 1.01 0.99
7 1 1.44 0.69
7 2 1.54 0.65
7 3 1.28 0.78
7 4 1.37 0.73
7 5 1.47 0.68
7 6 1.45 0.69
8 1 0.97 1.03
8 2 1.04 0.97
8 3 0.86 1.16
8 4 0.92 1.08
8 5 0.99 1.01
8 6 0.98 1.02
8 7 0.67 1.49
9 1 1.54 0.65
9 2 1.64 0.61
9 3 1.37 0.73
9 4 1.47 0.68
9 5 1.57 0.64
9 6 1.55 0.64
9 7 1.07 0.94
9 8 1.59 0.63
10 1 0.82 1.22
10 2 0.87 1.14
10 3 0.73 1.37
10 4 0.78 1.28
10 5 0.83 1.20
10 6 0.83 1.21
10 7 0.57 1.76
10 8 0.84 1.18
10 9 0.53 1.88
  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). Stay-at-home mothers were ranked in job stress level 8. CI = confidence interval.