Table 4 Follow-up time in the longitudinal study
From: Serum creatinine as a biomarker for dystrophinopathy: a cross-sectional and longitudinal study
| Â | Age of first examination (y) | Age of last examination (y) | Follow-up duration (y) | Frequency of examination (times) | Average interval timebetween contiguous examinations (y) | The number of individuals with 2 measurements | The number of individuals with 3 measurements | The number of individuals with 4 measurements |
|---|---|---|---|---|---|---|---|---|
DMD (n = 84) | 5.00 (3.00–7.00) | 7.00 (4.00–9.00) | 2.00 (1.00–3.00) | 2.00 (2.00–2.00) | 1.00 (1.00–2.00) | 72 | 9 | 3 |
BMD (n = 29) | 6.00 (3.00–9.50) | 8.00 (5.50–11.50) | 2.00 (1.00–3.00) | 2.00 (2.00–3.00) | 1.00 (1.00–2.00) | 18 | 8 | 3 |