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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