Counts and frequencies (%) of the single nucleotide polymorphisms studied at the RET locus
| Polymorphism | Allelles | Haddad (n = 88 alleles) | CCHS (n = 198 alleles) | χ2 | MWS+HSCR (n = 40 alleles) | MWS (n = 20 alleles) | χ2 |
|---|---|---|---|---|---|---|---|
| −5G→A | G | 50 (56.8) | 156 (79) | 14.6; p<0.001 | 28(70) | 16 (80) | 0.68; NS |
| A | 38 (41.2) | 42 (21) | 12 (30) | 4 (20) | |||
| IVS1 C→T | C | 53 (60.2) | 156 (79) | 10.67; p<0.005 | 27 (72.5) | 16 (80) | 0.49; NS |
| T | 35 (39.8) | 42 (21) | 11 (27.5) | 4 (20) | |||
| c135 G→A | G | 50 (56.8) | 152 (77) | 11.69; p<0.001 | 27 (72.5) | 16 (80) | 0.49; NS |
| A | 38 (41.2) | 46 (23) | 11 (27.5) | 4 (20) |