Clinical assessment of peripheral perfusion to predict postoperative complications after major abdominal surgery early: a prospective observational study in adults

Table 5 Predictive value after surgery for the different peripheral perfusion parameters, when altered, as predictors of severe complications ^a

Measurement parameters		AUC (95% CI)	P-values	Sensitivity (95% CI)	Specificity (95% CI)	Positive likelihood ratio	Negative likelihood ratio
CRT	D0	0.76 (0.65 to 0.80)	0.31	0.63 (0.38 to 0.83)	0.79 (70 to 87)	3.06	0.46
	D1	0.79 (0.66 to 0.90)	<0.001	0.68 (0.43 to 0.87)	0.91 (0.83 to 0.96)	7.42	0.35
	D2	0.91 (0.83 to 0.92)	<0.001	0.79 (0.54 to 0.94)	0.93 (0.86 to 0.97)	11.71	0.23
	D3	0.88 (0.78 to 0.93)	<0.001	0.71 (0.46 to 0.89)	0.93 (0.85 to 0.98)	10.15	0.34
PPI	D0	0.59 (0.45 to 0.70)	0.19	0.42 (0.20 to 0.67)	0.64 (0.53 to 0.74)	1.17	0.90
	D1	0.71 (0.57 to 0.82)	0.43	0.58 (0.34 to 0.80)	0.76 (0.66 to 0.84)	2.42	0.55
	D2	0.84 (0.75 to 0.91)	<0.001	0.74 (0.49 to 0.91)	0.84 (0.75 to 0.91)	4.52	0.31
	D3	0.81 (0.70 to 0.91)	<0.001	0.53 (0.29 to 0.76)	0.90 (0.82 to 0.95)	5.21	0.53
T _skin-diff	D0	0.59 (0.44 to 0.70)	0.23	0.73 (0.49 to 0.91)	0.50 (0.40 to 0.61)	1.54	0.50
	D1	0.73 (0.62 to 0.83)	0.14	0.82 (0.57 to 0.95)	0.58 (0.47 to 0.68)	1.91	0.36
	D2	0.79 (0.68 to 0.81)	<0.001	0.84 (0.60 to 0.97)	0.52 (42 to 63)	1.76	0.30
	D3	0.72 (0.60 to 0.80)	0.31	0.68 (0.43 to 0.87)	0.58 (0.48 to 0.69)	1.64	0.52

^aAUC, Area under the receiver operating characteristic curve; CI, Confidence interval; D0, Directly after surgery; D1, First postoperative day; D2, Second postoperative day; D3, Third postoperative day; PPI, Peripheral perfusion index; T_skin-diff, Forearm-to-fingertip skin temperature gradient. P < 0.017 is considered significant.

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