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Table 2 Comparison of smoking prevalence (%; 95% confidence interval) by ascertainment method and site, CRONICAS Study, Peru, 2010

From: Low cigarette smoking prevalence in peri-urban Peru: results from a population-based study of tobacco use by self-report and urine cotinine

Occasional smoking Lima
(n=195)
Tumbes
(n=187)
Total
(n=382)
Self-Report 10.3 (6.0, 14.5) 7.5 (3.7, 11.3) 8.9 (6.1, 11.8)
Creatinine-Adjusted Cotinine (10–100 mcg/mg) 0.5 (−0.5, 1.5) 2.1 (0.1, 4.2) 1.3 (0.2, 2.4)
Difference by method 9.7 (5.4, 14.1) 5.3 (1.0, 9.7) 7.6 (4.5, 10.7)
Daily smoking Lima
(n=195)
Tumbes
(n=187)
Total
(n=382)
Self-Report 3.1 (0.7, 5.5) 6.4 (2.9, 9.9) 4.7 (2.6, 6.8)
Creatinine-Adjusted Cotinine (≥100 mcg/mg) 2.1 (0.1, 4.0) 9.1 (5.0, 13.2) 5.5 (3.2, 7.8)
Difference by method 1.0 (−2.1, 4.2) −2.7 (−8.1, 2.7) −0.8 (−3.9, 2.3)
  1. Bold indicates significance at p = 0.05. Differences estimated by t-tests
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