Table 4.

Hospital and 90-day mortality risks of different patient groups

	Hospital mortality
Groups	Raw model∗	Adjusted model∗	Full model∗	Reduced model∗
IBW	1.88 (0.72–4.04)	1.18 (0.45–2.62)	1.06 (0.38–2.53)	1.06 (0.38–2.53)
ABW	1.09 (0.81–1.46)	1.33 (0.97–1.78)	1.25 (0.90–1.71)	1.24 (0.89–1.68)
BW	2.74 (2.29–3.27)	2.88 (2.39–3.45)	2.26 (1.85–2.75)	2.22 (1.82–2.7)
SCr	2.31 (1.93–2.76)	2.26 (1.88–2.7)	1.99 (1.63–2.43)	1.94 (1.59–2.35)

	90-day mortality
	Raw model∗	Adjusted model∗	Full model∗	Reduced model∗
IBW	2.09 (1.09–3.73)	0.99 (0.50–1.81)	0.93 (0.45–1.81)	0.93 (0.45–1.81)
ABW	0.86 (0.68–1.08)	1.03 (0.81–1.30)	1.02 (0.79–1.31)	1.02 (0.79–1.30)
BW	2.06 (1.78–2.37)	2.07 (1.78–2.40)	1.76 (1.49–2.07)	1.74 (1.48–2.05)
SCr	1.70 (1.47–1.96)	1.61 (1.39–1.86)	1.54 (1.31–1.81)	1.51 (1.29–1.77)

95% confidence interval in brackets, bold texts indicates P < 0.05. All odds ratios are interpreted in comparison with the non-AKI group.

^∗The Raw model only contains the group variable. The Adjusted model contains the group variable, age, sex, and body mass index. The Full model contains the group variable and all other covariates described in Covariables in the Method section. And the Reduced model contains variables selected by the backwards step method based on the Akaike information criterion. Full results of all the models are provided in Supplemental Digital Content 1.xls.

ABW indicates actual body weight; BW, body weight; IBW, ideal body weight; SCr, serum creatinine.