Table 3.
Allele frequencies for the CCTTT-repeat polymorphism
| Allele | SSc patients | Healthy controls | |
| With PAH | Without PAH | ||
| 6 | 2 | 0 | 0 |
| 7 | 2 | 0 | 0 |
| 8 | 8 | 0 | 4 |
| 9 | 6 | 4 | 8 |
| 10 | 10 | 11 | 19 |
| 11 | 5 | 16 | 25 |
| 12 | 6 | 29 | 42 |
| 13 | 0 | 22 | 32 |
| 14 | 1 | 14 | 29 |
| 15 | 0 | 7 | 13 |
| 16 | 0 | 4 | 13 |
| 17 | 0 | 4 | 4 |
| 18 | 0 | 2 | 1 |
| 19 | 0 | 2 | 0 |
| 20 | 0 | 0 | 0 |
| 21 | 0 | 1 | 0 |
P < 0.0001 for patients with both SSc and PAH compared with healthy control subjects by the Mann-Whitney U test. P < 0.0001 for patients with both SSc and PAH compared with patients with SSc but not PAH by the Mann-Whitney U test. PAH, pulmonary arterial hypertension; SSc, systemic sclerosis.