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Table 1 The association of place of mothers birth for sex ratio at live birth for all births in England and Wales 2007-2011

From: Is the mothers’ country of birth associated with the sex of their offspring in England and Wales from 2007 to 2011?

Region of mother’s birth

Number of males born

Number of females born

Sex Ratio

Odds ratio*

95% confidence interval

p value

UK

1,375,306

1,304,933

1.054

1

-

-

Outside UK

446,166

425,539

1.048

0.995

0.99 – 1.00

0.035

Outside UK divided by continent

      

Europe

140 445

133254

1.054

1.00

0.99 - 1.01

0.992

Africa

99 771

96 422

1.035

0.98

0.97 - 0.99

<0.001

The Americas and the Caribbean

29 145

27 435

1.062

1.01

0.99 - 1.02

0.350

Middle East and Asia

167 146

159 299

1.049

1.00

0.99 - 1.00

0.231

Antarctica and Oceania

9 659

9 129

1.058

1.00

0.98 - 1.03

0.790

  1. *The reference group is mothers who were born in the UK.