Table 1 Study population and response
Cases | Controls | |||
|---|---|---|---|---|
Centers (n) | 1 | 6 | ||
N | % | N | % | |
Contacted | 885 | 100.0 | 1459 | 100.0 |
Not eligible | 598 | 73.0 | 353 | 24.2 |
Of these: | ||||
No address available | 1 | 0.2 | 246 | 69.7 |
Other diagnosis than Oligoarticular JIA1 | 345 | 57.7 | 0 | 0.0 |
Malformation | 3 | 0.5 | 36 | 10.2 |
Died | 0 | 0.0 | 1 | 0.3 |
Born outside Germany | 24 | 4.0 | 34 | 9.6 |
Outside age range | 225 | 37.6 | 0 | 0.0 |
Others | 0 | 0.0 | 34 | 9.6 |
Eligible study population | 287 | 100.0 | 1106 | 100.0 |
Responders | 254 | 88.5 | 950 | 85.9 |
Missing data | 16 | 5.6 | 118 | 10.7 |
Included in data analyses | 238 | 82.9 | 832 | 75.2 |