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Table 1 Job type stress levels and sex ratio.

From: Mother's occupation and sex ratio at birth

Job category Stress level % male births N
Arts, cultural, recreational, sports 1 52.10 119
Social, legal, government, educational, religious services 2 53.83 1257
Engineering, natural sciences, architectural, IT 3 49.02 714
Business, finance, administration 4 50.33 2492
Sales, services 5 51.47 3674
Management 6 51.61 2939
Farming, fishing and natural resources 7 44.90 49
Health, Stay-at-home, armed forces 8 52.34 4471
Trades, transport, construction 9 40.38 265
Processing, manufacturing, utilities 10 51.53 392
  1. Given are different job type stress levels, percent male births, and sample sizes (N). Stress level of 1 = lowest stress level, 10 = highest stress level. The data set includes births and other information collected by Addenbrooke's hospital in Cambridge, England, between 2000 and 2005. P-values in bold indicate significant of p < 0.05 or smaller.