RETN and asthma: However, the study by Kim et al. [58] found resistin to be a predictive factor for asthma (Log resistin OR = 0.587; 95% CI: 0.35–0.98) but not leptin (Log leptin OR = 0.94; 95% CI: 0.65–1.35) which, however, did correlate inversely with FEV1 and FEF25-75.