Association analysis of surfactant protein B single nucleotide polymorphisms(SNPs) for probability of any chronic obstructive pulmonary disease exacerbation
| SNP | Allele frequency | p-value | ||
| Nonexacerbators | Exacerbators | Allele Test | Armitage Trend Test | |
| rs2118177 | 0.39 | 0.33 | 0.11 | 0.13 |
| rs2304566 | 0.29 | 0.23 | 0.10 | 0.10 |
| rs1130866 | 0.50 | 0.44 | 0.10 | 0.10 |
| rs2077079 | 0.35 | 0.40 | 0.20 | 0.20 |
| rs3024791 | 0.19 | 0.12 | 0.007 | 0.008 |