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Distribution of Haptoglobin (HP) isotypes in the study cohort was compared by Chi-square to the distribution of HP isotypes from population prevalence studies. aThe distribution of HP isotypes for the population cohort were obtained from references16 and 17.
| Patients | HP 1-1 | HP 2-1 | HP 2-2 | Chi-square test, p |
|---|---|---|---|---|
| Study cohort (n = 20) | 4 | 7 | 9 | 0.57 |
| Population studies (n = 100)a | 16 | 48 | 36 |
