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Table 12 Current cigar smoking and pancreatic cancer by inhalation level, cigars per day, and duration

From: Systematic review of cigar smoking and all cause and smoking related mortality

Study Cohort name Inhalation level Cigars per day Duration (years) Effect estimate 95% CI Measure Primary/secondary*
Shanks1998 CPS-I   1 to 2   1.18 (0.69, 1.89) IRR Primary
Shanks1998 CPS-I   3 to 4   1.51 (0.86, 2.45) IRR Primary
Shanks1998 CPS-I   5+   2.21 (1.40, 3.32) IRR Primary
Shanks1998 CPS-I   1 to 2   0.56 (0.06, 2.01) IRR Secondary
Shanks1998 CPS-I   3 to 4   1.9 (0.82, 3.74) IRR Secondary
Shanks1998 CPS-I   5+   3.71 (1.78, 6.83) IRR Secondary
Shapiro2000 CPS-II   1 to 2   0.6 (0.30, 1.40) HR Primary
Shapiro2000 CPS-II   3+   1.6 (1.00, 2.50) HR Primary
Shanks1998 CPS-I None    1.55 (1.12, 2.07) IRR Primary
Shanks1998 CPS-I Slight    2.16 (0.99, 4.10) IRR Primary
Shanks1998 CPS-I Moderate-deep   2.26 (0.45, 6.60) IRR Primary
Shanks1998 CPS-I None    1.55 (0.80, 2.72) IRR Secondary
Shanks1998 CPS-I Slight    1.92 (0.52, 4.92) IRR Secondary
Shanks1998 CPS-I Moderate-deep   2.53 (0.51, 7.39) IRR Secondary
Shapiro2000 CPS-II No inhalation   0.9 (0.50, 1.50) HR Primary
Shapiro2000 CPS-II Inhalation    2.7 (1.50, 4.80) HR Primary
Shapiro2000 CPS-II    <25 1.5 (0.70, 3.30) HR Primary
Shapiro2000 CPS-II    25+ 1.1 (0.70, 1.80) HR Primary
  1. *Primary cigar smoking: current, exclusive cigar smoking with no previous history of cigarette or pipe smoking; secondary cigar smoking: current, exclusive cigar smoking with previous history of cigarette or pipe smoking.