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Table 4 Standardised mortality ratio (SMR) by disability score

From: Survival and mortality in cerebral palsy: observations to the sixth decade from a data linkage study of a total population register and National Death Index

Disability score N N deaths N Expected deaths SMR (exact 95% CI) SMR (95% CI) of combined DISAB groups
1 123 1 1.432 0.698 (0.35, 3.44) 1.62 (1.24, 2.08)
2 463 5 6.651 0.752 (0.28, 1.67)
3 558 18 10.53 1.709 (1.05, 2.65)
4 488 18 9.590 1.877 (1.15, 2.91)
5 302 15 6.939 2.162 (1.26, 3.49)
6 235 32 5.225 6.124 (4.26, 8.54) 6.43 (4.93, 8.25)
7 176 26 3.790 6.861 (4.58, 9.91)
8 138 31 2.673 11.60 (8.02, 16.3) 11.6 (8.02, 16.3)
9 225 92 3.344 27.51 (22.3, 33.6) 27.5 (22.3, 33.6)
10 242 106 2.574 41.19 (33.9, 49.6) 41.2 (33.9, 49.6)
11 117 74 0.677 109.3 (86.5, 136.5) 110 (88.7, 136)
12 13 9 0.077 116.7 (56.9, 214.2)