Table III.

Fecundability odds ratios (FORs) according to digit ratio in 696 women from the MIREC study.

	Right hand		Left hand
	Crude FOR [95% CI]	Adjusteda (n = 654)b FOR [95% CI]	Crude FOR [95% CI]	Adjusteda (n = 654)b FOR [95% CI]
Digit ratio tertile (right/left medians)
1 (0.952/0.954)	1.17 [0.94, 1.47]	1.19 [0.93–1.51]	1.15 [0.92, 1.44]	1.16 [0.91–1.47]
2 (0.982/0.972)	1.05 [0.84, 1.31]	0.97 [0.77–1.23]	1.07 [0.86, 1.34]	1.01 [0.80–1.28]
3 (1.021/1.000)	Reference	Reference	Reference	Reference
Age		0.95 [0.93–0.97]		0.95 [0.93–0.97]
Ethnicity
White		Reference		Reference
Black		1.03 [0.55–1.92]		1.02 [0.55–1.92]
Latin		0.43 [0.23–0.80]		0.44 [0.24–0.82]
Chinese		1.21 [0.54–2.68]		1.21 [0.55–2.67]
Other		0.76 [0.54–1.07]		0.75 [0.53–1.06]
Pre-pregnancy body mass index
<24.9		Reference		Reference
25–29.9		0.88 [0.68–1.13]		0.87 [0.68–1.12]
>30		0.74 [0.57–0.97]		0.75 [0.58–0.99]
Digit ratio dichotomized
<1	1.12 [0.92, 1.36]	1.08 [0.88–1.33]	1.17 [0.95, 1.44]	1.14 [0.92–1.42]
≥1	Reference	Reference	Reference	Reference
Age		0.95 [0.93–0.97]		0.95 [0.93–0.97]
Ethnicity
White		Reference		Reference
Black		1.06 [0.57–1.98]		1.04 [0.55–1.95]
Latin		0.46 [0.25–0.85]		0.46 [0.25–0.85]
Chinese		1.23 [0.56–2.74]		1.18 [0.53–2.61]
Other		0.74 [0.53–1.04]		0.74 [0.52–1.03]
Pre-pregnancy body mass index
<24.9		Reference		Reference
25–29.9		0.87 [0.68–1.12]		0.88 [0.69–1.13]
>30		0.75 [0.58–0.99]		0.75 [0.57–0.98]

^aAdjusted by age, ethnicity and pre-pregnancy body mass index.

^bDue to missing values of pre-pregnancy body mass index.