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Table 3 Population, No. of cancer, Incidence Rate Ratios (IRR) and 95% Confidence Intervals (95% CI) for type of diabetes, treatment (only for type 2 diabetes), and diabetes duration vs subjects without diabetes

From: Diabetes and risk of cancer incidence: results from a population-based cohort study in northern Italy

  Person-years N cancer IRR 95% CI
Without diabetes 1,499,890 9858 1.00 -
With diabetes 85,953 1464 1.22 1.15–1.29
By type of diabetes:
 Type 1 diabetes 3017 15 0.88 0.53–1.47
 Secondary diabetesa 393 10 2.04 1.10–3.80
 Type 2 diabetes 82,542 1439 1.22 1.15–1.29
By treatment:
 Diet only 22,900 349 1.10 1.00–1.23
 OHAs only 44,637 792 1.22 1.14–1.32
 Insulin only 7738 161 1.32 1.13–1.54
 OHAs + insulin 7267 137 1.37 1.16–1.62
By diabetes duration (years):
 0–1 24,553 361 1.10 0.99–1.23
 2–5 24,710 403 1.23 1.11–1.36
 6–10 17,033 337 1.44 1.29–1.61
 11+ 19,658 363 1.15 1.04–1.30
  1. IRR = calculated using Poisson model, adjusted for age, foreign status, and sex. People without diabetes were used as reference. adiseases of the exocrine pancreas and drug-induced diabetes