. 2022 Dec 31;19(4):1039–1048. doi: 10.14245/ns.2244326.163

Table 2.

Univariate analysis of mFI-5, RAI-A, and RAI-Rev for 30-day postoperative outcomes: mortality, major complication, Clavien-Dindo physical status classification grade IV, reoperation, readmission, ELOS, and nonroutine discharge in TSI data from NSQIP 2015–2019

Variable		Mortality	Major complication	Clavien-Dindo class IV	Unplanned readmission	Reoperation	Extended hospital LOS	Discharge to nonhome destination
mFI-5
	Prefrail	1.34 (0.82–2.20)	1.84 (1.53–2.21)^**	1.71 (1.36–2.16)^***	1.81 (1.45–2.26)^***	1.47 (1.13–1.91)^*	1.88 (1.65–2.15)^***	2.68 (2.38–3.01)^***
	Frail	2.55 (1.55–4.19)^***	2.93 (2.41–3.57)^***	3.00 (2.35–3.82)^***	2.39 (1.87–3.05)^***	2.19 (1.65–2.91)^***	2.83 (2.43–3.29)^***	4.63 (4.02–5.34)^***
	Severely frail	4.79 (2.50–9.17)^***	5.41 (4.05–7.23)^***	4.39 (3.08–6.26)^***	4.28 (3.03–6.07)^***	2.57 (1.64–4.04)^***	5.90 (4.56–7.63)^***	6.83 (5.18–9.02)^***
RAI-A
	Prefrail	5.63 (3.61–8.76)^***	2.32 (1.98–2.71)^***	2.77 (2.28–3.37)^***	1.38 (1.13–1.68)^*	1.39 (1.09–1.76)	2.63 (2.33–2.97)^***	4.13 (3.67–4.66)^***
	Frail	9.33 (5.08–17.12)^***	4.26 (3.27–5.57)^***	4.96 (3.64–6.75)^***	2.42 (1.73–3.38)^***	2.67 (1.82–3.92)^***	4.84 (3.81–6.16)^***	7.96 (5.92–10.70)^***
	Severely frail	20.78 (8.73–49.49)^***	8.24 (4.88–13.94)^***	8.99 (5.12–15.81)^***	3.75 (2.00–7.02)^***	4.77 (2.44–9.32)^***	5.70 (3.37–9.66)^***	9.27 (4.68–18.37)^***
RAI-Rev
	Prefrail	0.97 (0.10–9.37)	2.04 (1.37–3.03)^***	2.30 (1.28–4.15)^*	2.06 (1.29–3.29)^*	1.53 (0.94–2.51)	3.33 (2.42–4.60)^***	2.83 (2.20–3.66)^***
	Frail	12.90 (1.78–93.41)^*	4.14 (2.83–6.04)^***	5.45 (3.11–9.57)^***	2.95 (1.87–4.64)^***	2.19 (1.37–3.51)^*	6.72 (4.92–9.18)^***	11.64 (9.09–14.90)^***
	Severely frail	48.12 (6.64–348.52)^***	7.28 (4.89–10.83)^***	11.50 (6.47–20.45)^***	6.76 (4.23–10.80)^***	3.17 (1.91–5.25)^***	11.90 (8.55–16.57)^***	18.08 (13.70–23.84)^***

Values are presented as odds ratio (95% confidence interval).

mFI-5, 5-factor modified frailty index; RAI-A, Risk Analysis Index-administrative; RAI-Rev, Risk Analysis Index recalibrated version; ELOS, extended length of stay; TSI, traumatic spine injury; NSQIP, National Surgical Quality Improvement Program; LOS, length of stay.

p<0.05.

^***

p<0.001, statistically significant.