CRP and schizophrenia: In the 18 sets of 17 SNPs, the variance explained (Nagelkerke’s pseudo-R2) ranged from 0.012% to 0.034%, with p-values ranging from 9.3 × 10−5 to 1.6 × 10−2, suggesting that the protective effect observed between risk alleles for CRP and schizophrenia was not driven by a small number of SNPs with large effects.