Table 2

Standardised incidence ratio and 95% confidence interval for adenocarcinoma of the oesophagus among Swedish men and women with colonic cancer, by latency interval

Latency interval after diagnosis of colonic cancer (years)
<11–45–910–340–341–34
Number of patients remaining in the cohort118 03077 82340 78920 022118 03077 823
Number of person years at risk94 017116 286144 132134 065538 500444 483
Number of observed adenocarcinomas of the oesophagus3242118
Number of expected adenocarcinomas of the oesophagus1.52.82.62.69.58.0
Standardised incidence ratio2.00.71.50.81.21.0
95% confidence interval0.4–5.80.1–2.60.4–3.90.1–2.80.6–2.10.4–2.0