| | |  | | | | Record from Web of Science® | | | | | | |
| Colorectal cancer prevention by non-steroidal anti-inflammatory drugs: effects of dosage and timing |
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| Author(s): Collet JP, Sharpe C, Belzile E, Boivin JF, Hanley J, Abenhaim L |
| Source: BRITISH JOURNAL OF CANCER Volume: 81 Issue: 1 Pages: 62-68 Published: SEP 1999 |
| Times Cited: 96 References: 30 |
| Abstract: Epidemiological studies show that non-steroidal anti-inflammatory drugs (NSAIDs) reduce colorectal cancer incidence. We measured the rate ratio for colorectal adenocarcinoma according to dosage and the timing of exposure by means of a case-control study, nested in a non-concurrent cohort linkage study, using the population of beneficiaries of the Saskatchewan Prescription Drug Plan from 1981 to 1995 with no history of cancer since 1970 as the source population. Four controls per case, matched on age and gender and alive when the case was diagnosed, were randomly selected. Dispensing rates, calculated over successive time periods, characterized NSAID exposure. We accrued 3844 cases of colon cancer and 1971 cases of rectal cancer. For colon cancer a significant trend towards a decreasing rate ratio was associated with increasing exposure during the 6 months preceding diagnosis (P-trend = 0.002), For both cancers, significant trends were associated with exposure 11-15 years before diagnosis (colon: P-trend = 0.01; rectum: P-trend = 0.0001), At the highest exposure levels the rate ratio for colon cancer was 0.57 (95% confidence interval (CI) 0.36-0.89); for rectal cancer it was 0.26 (95% CI 0.11-0.61), No protection was associated with exposure during other periods. The timing of NSAID use must be considered in planning intervention trials to prevent colorectal cancer. There may be a 10-year delay before any preventive effect will appear. |
| Document Type: Editorial Material |
| Language: English |
| Reprint Address: Collet, JP (reprint author), Sir Mortimer B Davis Jewish Hosp, Ctr Clin Epidemiol & Community Studies, 3755 Chemin Cote Ste Catherine, Montreal, PQ H3T 1E2 Canada |
Addresses:
1. Sir Mortimer B Davis Jewish Hosp, Ctr Clin Epidemiol & Community Studies, Montreal, PQ H3T 1E2 Canada
2. McGill Univ, Joint Dept Epidemiol & Biostat & Occupat Hlth, Montreal, PQ Canada |
| Publisher: CHURCHILL LIVINGSTONE, JOURNAL PRODUCTION DEPT, ROBERT STEVENSON HOUSE, 1-3 BAXTERS PLACE, LEITH WALK, EDINBURGH EH1 3AF, MIDLOTHIAN, SCOTLAND |
| Subject Category: Oncology |
| IDS Number: 230RB |
| ISSN: 0007-0920 |
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