CHIA and asthma: As for CHIA rs10494132 polymorphism, results based on all included studies provided no evidence of association between CHIA rs10494132 polymorphism and asthma risk in any genetic models in the overall population (recessive model, TT vs. TC + CC: OR = 1.212, 95% CI = 0.981–1.497, P = 0.075; dominant model, TT + TC vs. CC: OR = 0.857, 95% CI = 0.597–1.230, P = 0.403; codominant model, TC vs. CC: OR = 0.748, 95% CI = 0.504–1.109, P = 0.149; homozygote model, TT vs. CC: OR = 0.916, 95% CI = 0.630–1.331, P = 0.646 and allele model, T vs. C: OR = 1.094, 95% CI = 0.924–1.297, P = 0.298).