Research Article
Comorbidities of Idiopathic Thrombocytopenic Purpura: A Population-Based Study
Table 2
Distribution of number of controls per case.
| Number of controls per case | Frequency (cases) | Percent | Cumulative percent |
| 0 | 150 | 14.5 | 14.52 | 1 | 64 | 6.20 | 20.72 | 2 | 39 | 3.78 | 24.49 | 3 | 68 | 6.58 | 31.07 | 4 | 206 | 19.9 | 51.02 | 5 | 506 | 49.0 | 100.00 |
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