Table 5. The adjusted decompression sickness (DCS) risk ratios from logistic regressions for precordial (PRE) vs. subclavian (SC) measurements; reference groups for HBG are PRE HBG = 0 and SC HBG = 0 respectively; for the exposure index Q, the adjusted RR are given per 10-point increase (see text for explanation) .

Covariate	RR [95% CI]	p-value	AIC
Q, PRE	1.18 [1.07−1.32]	0.04	193
Q, SC	1.18 [1.06−1.33]	0.004	180