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Table 4 Crude and adjusted rate ratios of mishaps and unsafe conditions comparing different checklist use groups

From: Mishaps and unsafe conditions in recreational scuba diving and pre-dive checklist use: a prospective cohort study

Mishaps Rate ratios (95% Confidence Intervals)
No checklist vs memorized Written vs memorized checklist Written vs memorized or no checklist
Crude Adjusteda Crude Adjusteda Crude Adjusteda
Major 0.85 (0.47, 1.53) 0.75 (0.43, 1.30) 0.42 (0.13, 1.37) 0.29 (0.10, 0.88) 0.43 (0.13, 1.41) 0.31 (0.10, 0.93)
Minor 1.06 (0.60, 1.87) 0.96 (0.56, 1.61) 0.65 (0.31, 1.34) 0.61 (0.29, 1.27) 0.64 (0.30, 1.35) 0.62 (0.29, 1.29)
All 0.97 (0.64, 1.48) 0.85 (0.59, 1.21) 0.55 (0.28, 1.09) 0.46 (0.26, 0.80) 0.55 (0.27, 1.13) 0.47 (0.27, 0.83)
Unsafe conditions 1.25 (0.72, 2.17) 1.16 (0.70, 1.95) 0.55 (0.30, 1.02) 0.45 (0.22, 0.92) 0.52 (0.28, 0.98) 0.44 (0.22, 0.87)
  1. aAdjusted for sex, race, age (<35 years/ ≥ 35 years), poor-visibility, high-current, and average annual dives