TABLE 2.

Univariate and multivariable analyses of primary and secondary outcomes in those with preoperative thrombocytopenia compared to those with PLT counts of more than 100 × 10⁹/L

Outcome	Univariate analysis			Multivariable analysis†
	OR*	95% CI	p value	OR*	95% CI	p value
Perioperative RBCs	4.48	3.89–5.15	<0.0001	2.15	1.72–2.68	<0.0001
Intraoperative RBCs	3.96	3.42–4.58	<0.0001	1.67	1.31–2.12	<0.0001
Reoperation	4.12	3.14–5.40	<0.0001	1.75	1.18–2.59	0.0053
Mortality	6.39	5.04–8.10	<0.0001	1.87	1.29–2.70	0.0009

^*ORs are for preoperative thrombocytopenia. ORs higher than 1.00 indicate increased likelihood of the listed outcome in patients with thrombocytopenia.

^†Adjusted including all baseline characteristics having significant differences between patient groups with PLT counts of more than 100 × 10⁹/L and those with PLT counts of not more than 100 × 10⁹/L, utilizing a threshold p value of less than 0.1. Variables included in conditional logistic regression modeling—age; sex; Charlson score; perioperative warfarin, heparin; preoperative Hb, PLT count, INR, creatinine; ASA type (“ASA 1” as reference); emergency surgery; procedure type (“general surgery” as reference); anesthetic type (general vs. regional); surgical duration.