Table III.

Omega fatty acid serum concentrations, presented as mean ± SD, by pregnancy outcome, with age-adjusted OR for risk of miscarriage.

Omega fatty acid	Miscarriage (n = 36)	Live birth (n = 114)	P-value*	Age-adjusted OR** (95% CI)
Omega-3
ALA	0.047 ± 0.034	0.048 ± 0.038	0.930	1.01 (0.92, 1.12)
EPA	0.006 ± 0.005	0.004 ± 0.003	0.030	1.32 (1.00, 1.47)
DHA	0.026 ± 0.017	0.024 ± 0.015	0.502	1.11 (0.87, 1.41)
Omega-6
LA	0.554 ± 0.347	0.560 ± 0.429	0.942	1.09 (0.42, 2.80)
DGLA	0.007 ± 0.004	0.007 ± 0.003	0.715	1.42 (0.57, 3.5)
AA	0.049 ± 0.016	0.047 ± 0.019	0.658	1.09 (0.89, 1.32)
Ratio of LA to ALA	13.270 ± 5.137	12.710 ± 3.787	0.481	1.02 (0.93, 1.13)

^*Student’s t-test.

^**For LA, the OR is for a 1 μmol/ml increase in concentration. All other omega fatty acid variables were multiplied by 100 and therefore the fecundability ratio represents a 1/100 μmol/ml change in concentration.

OR, odds ratio.

Due to using inverse probability weighting, the 95% CIs were calculated using robust variance.