Table IV.

Follow-up of children born in the index cycle (FAS live births excluding one set of twins).

Variable	Weight reduction and IVF group n = 45	IVF only group n = 41	p-value	Mean difference between groups (95% CI)
Female	25 (55.6)	22 (53.7)	1.00
Birth weight (g)	3486 (523) 3560 (1820; 4384)	3584 (509) 3638 (2140; 4820)	0.46
Weight standard deviation  score at birth	−0.021 (0.868) -0.050 (−1.615; 1.571)	0.073 (1.073) 0.061 (−2.605; 2.282)	0.61	0.104 (−0.332; 0.526)
Weight standard deviation  score 2 year visit*	0.218 (1.329) 0.245 (−1.986; 4.241)	−0.055 (1.271) -0.258 (−1.973; 3.530)	0.25	0.327 (−0.272; 0.932)

For categorical variables, n (%) is presented. For continuous variables, Mean (SD)/Median (Min; Max)/n = is presented. For comparison between groups, Fisher’s Exact test (lowest 1-sided p-value multiplied by 2) was used for dichotomous variables and the Mann-Whitney U-test was used for continuous variables. The CI for dichotomous variables is the unconditional exact confidence limits. If no exact limits can be computed, the asymptotic Wald confidence limits with continuity correction are calculated instead. The CI for the mean difference between groups is based on Fishers non-parametric permutation test.

^*Six women in the weight reduction and IVF group and three in the IVF-only group, who had a live birth in the index cycle, did not participate in the follow-up. Missing weight data at the 2-year follow-up: three in the weight reduction and IVF group and two in the IVF-only group.