Table 4. Haplotype frequencies of IL-13 in this study participants.
| Haplotypea | frequency |
| h0100 | 0.3314 |
| h0000 | 0.3088 |
| H0011 | 0.1356 |
| H1011 | 0.1133 |
| H0111b | 0.0470 |
| H0001b | 0.0173 |
| H1000b | 0.0135 |
| H1100b | 0.0083 |
| H0010b | 0.0079 |
| H1111b | 0.0057 |
| H1010b | 0.0039 |
| H0101b | 0.0033 |
| H0110b | 0.0014 |
| H1001b | 0.0012 |
| H1101b | 0.0010 |
| H1110b | 0.0004 |
a
0: common allele and 1: minor allele, by the order of SNP1 (rs1800925): C/T; SNP2 (rs2066960): C/A; SNP3 (rs20541): C/T; SNP4 (rs848): G/T.
b
Haplotypes were collapsed into a category in the haplotype analyses.