Table 1: Anti-C1q antibody concentrations in 60 women with failed pregnancies, including 30 women with ectopic pregnancy (EP) and missed abortion (MA) and 33 women with intrauterine pregnancy (IUP). The nonparametric Kruskal-Wallis test was used to identify differences among EP, MA, and viable IUP. To perform pairwise comparisons between groups Mann-Whitney test was conducted determining as critical value for significance P = 0.0167 after using Bonferroni correction which determined as critical value of significance for each (Mann-Whitney) test the value 0.0167. Therefore anti-C1q antibody levels are not helpful in differentiating between the three groups since as shown in Table 1 there is no P value <0.167.

Failed pregnancies (MA and EP)
Normal
P value

Anti-C1qMedian30.9238.950.018 *
IQR17.89–40.7928.95–59.01

Pregnancy outcome
IUPMAEP

Anti-C1qMedian38.9531.9718.820.045 **
IQR28.95–59.0123.95–39.4716.32–40.79

Mann-Whitney test.
**Kruskal-Wallis test.