Table 3.
Overall standardised mortality ratios (SMRs) by time since diagnosis.
| Age at diagnosis |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| <15 years
(n = 284) |
≥15 years
(n = 318) |
Total population
(n = 602) |
|||||||
| Time since diagnosis | Obs | Exp | SMR (95% CI) | Obs | Exp | SMR (95% CI) | Obs | Exp | SMR (95% CI) |
| First year | <5 | a | 0.00 (0.00–9.39) | 11 | 2.27 | 4.85 (2.42–8.68)b | 11 | 2.66 | 4.14 (2.06–7.40)b |
| 1–4 years | <5 | a | 0.00 (0.00–2.87) | 27 | 10.74 | 2.51 (1.66–3.66)b | 27 | 12.03 | 2.24 (1.48–3.27)b |
| 5–9 years | <5 | a | 11.22 (3.06–29.00)b | 26 | 17.5 | 1.49 (0.97–2.18) | 30 | 17.86 | 1.68 (1.13–2.40)b |
| 10–14 years | <5 | a | 2.18 (0.06–12.00) | 29 | 18.57 | 1.56 (1.05–2.24)b | 30 | 19.03 | 1.58 (1.06–2.25)b |
| 15–24 years | <5 | a | 1.31 (0.16–4.73) | 50 | 37.93 | 1.32 (0.98–1.74) | 52 | 39.45 | 1.32 (0.98–1.72) |
| 25+ years | 25 | 11.18 | 2.24 (1.45–3.30)b | 62 | 64.01 | 0.97 (0.74–1.24) | 87 | 75.19 | 1.16 (0.93–1.43) |
CI: confidence interval; Exp: expected deaths; Obs: observed deaths.
a
In order to minimise the risk of disclosure of the identity of individual study participants, we have adhered to the rule of thumb suggested by the Office for National Statistics of suppressing all cell frequencies where the observed cell frequency is less than 5 (‘Review of the Dissemination of Health Statistics: Confidentiality Guidance: National Statistics; HMSO 2006’): bp < 0.05.