Table 4.

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

Mishaps	Rate ratios (95% Confidence Intervals)
	No checklist vs memorized		Written vs memorized checklist		Written vs memorized or no checklist
	Crude	Adjusted^a	Crude	Adjusted^a	Crude	Adjusted^a
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)

^aAdjusted for sex, race, age (<35 years/ ≥ 35 years), poor-visibility, high-current, and average annual dives