Table 4.
Number of Affected SDRs | Number | Observed | Expected | RR | 95% CI | p-value |
---|---|---|---|---|---|---|
0 | 33,300 | 539 | 228.8 | 2.36 | 2.16, 2.56 | <0.00001 |
>=1 | 6,882 | 127 | 42.0 | 3.03 | 2.52, 3.60 | <0.00001 |
>=2 | 1,283 | 14 | 7.0 | 2.00 | 1.09, 3.36 | 0.01 |
>=3 | 237 | 4 | 1.2 | 3.42 | 1.17, 8.75 | 0.03 |