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. 2017 Aug 25;7:9546. doi: 10.1038/s41598-017-08768-3

Table 1.

Demographic characteristics of included and excluded mothers

Included mothers (n = 477–494) Mean (SD) Excluded mothers (n = 496–517) Mean (SD) t p
Age (years) 32.4 (4.5) 31.9 (4.5) 1.93 0.43
Number of children 0.24 (0.53) 0.26 (0.53) 0.72 0.30
Partner’s age (years) 34.7 (5.7) 34.4 (5.8) 0.74 0.45