Table 2 Logistic regression models incorporating measures of baseline erythrocyte saturated and unsaturated fatty acids for prediction of ongoing pregnancy at day 45 post LH-surge.

From: Pre-conception maternal erythrocyte saturated to unsaturated fatty acid ratio predicts pregnancy after natural cycle frozen embryo transfer

Variable

Odds ratio

CI

P

C statistic

AIC

Univariate models

Saturated fatty acid (nmol/mL)

1.00

1.00, 1.00

0.89

0.51

112.5

Unsaturated fatty acid (nmol/mL)

1.00

1.00, 1.00

0.30

0.57

111.4

Total fatty acid (nmol/mL)

1.00

1.00, 1.00

0.51

0.54

112.0

Saturated/unsaturated fatty acid ratio (0.05 units)

7.19

2.33, 22.2

0.00059

0.75

97.4

Saturated – unsaturated fatty acid difference (nmol/mL)

1.02

1.00, 1.03

0.0085

0.67

104.4

Combined model 1

   

0.75

97.6

Saturated fatty acid (nmol/mL)

1.05

1.02, 1.07

0.00057

  

Unsaturated fatty acid (nmol/mL)

0.97

0.95, 0.99

0.00042

  

Combined model 2

   

0.75

97.6

Total fatty acid (nmol/mL)

1.01

1.00, 1.01

0.0063

  

Saturated – unsaturated fatty acid difference (nmol/mL)

1.04

1.02, 1.06

0.00047

  

Combined model 3

   

0.75

99.3

Total fatty acids (nmol/mL)

1.00

1.00, 1.00

0.70

  

Saturated/unsaturated fatty acid ratio (0.05 units)

7.63

2.36, 24.6

0.00068

  
  1. Odds ratios are for a 1 unit increase in a variable. AIC = Akaike Information Criterion, CI = confidence interval. Plasma and erythrocyte fatty acid data was missing for n = 1 non-pregnant participant.
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