SIR for cervical cancer in full and half-siblings according to the Family-Cancer Database
| Sibling type . | Invasive only . | . | Invasive + in situ . | . | Invasive + in situ (adjusted)* . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Observed . | SIR (95% CI) . | Observed . | SIR (95% CI) . | Observed . | SIR (95% CI) . | |||
| Full sibling | 34 | 1.92 (1.33-2.68) | 8,069 | 1.82 (1.78-1.86) | 8,069 | 1.84 (1.81-1.88) | |||
| Paternal half-sibling | 2 | 1.38 (0.13-5.07) | 734 | 1.56 (1.45-1.67) | 734 | 1.27 (1.18-1.36) | |||
| Maternal half-sibling | 0 | 677 | 1.79 (1.67-1.93) | 677 | 1.40 (1.30-1.51) | ||||
| Any half-sibling | 2 | 0.75 (0.07-2.77) | 1,411 | 1.64 (1.56-1.72) | 1,411 | 1.31 (1.24-1.37) | |||
| Sibling type . | Invasive only . | . | Invasive + in situ . | . | Invasive + in situ (adjusted)* . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Observed . | SIR (95% CI) . | Observed . | SIR (95% CI) . | Observed . | SIR (95% CI) . | |||
| Full sibling | 34 | 1.92 (1.33-2.68) | 8,069 | 1.82 (1.78-1.86) | 8,069 | 1.84 (1.81-1.88) | |||
| Paternal half-sibling | 2 | 1.38 (0.13-5.07) | 734 | 1.56 (1.45-1.67) | 734 | 1.27 (1.18-1.36) | |||
| Maternal half-sibling | 0 | 677 | 1.79 (1.67-1.93) | 677 | 1.40 (1.30-1.51) | ||||
| Any half-sibling | 2 | 0.75 (0.07-2.77) | 1,411 | 1.64 (1.56-1.72) | 1,411 | 1.31 (1.24-1.37) | |||
NOTE: Boldfaced, 95% CI and 99% CI do not include 1.00.
Adjusted for the number of parents with whom parents had children.