Table 6
Risk of serious infection (all sites combined) by risk score
Risk score
RR (95% CI)
0
1
1
1.6 (0.9 to 2.6)
2
3.5 (1.9 to 6.3)
3
7.4 (3.3 to 16.8)
Trend
1.9 (1.5 to 2.5)