Table 3 –

Comparison of incidental and non-incidental thrombocytopenia according to patient anemia status^*

		Incidental TCP		Non-incidental TCP
	Interaction P	Estimate (95% CI)	P	Estimate (95% CI)	P
Hospital length of stay†
Non-anemic patients	0.042	1.11 (1.00, 1.22)	0.042	0.98 (0.92, 1.05)	0.583
Anemic patients	0.145	1.00 (0.93, 1.08)	0.949	1.07 (1.02, 1.13)	0.010
Perioperative transfusion‡
Non-anemic patients	0.048	2.44 (1.66, 3.60)	<.001	3.83 (3.06, 4.79)	<.001
Anemic patients	<.001	1.73 (1.34, 2.22)	<.001	3.18 (2.66, 3.80)	<.001
Re-operation within 72 hours ‡
Non-anemic patients	0.130	0.24 (0.03, 1.69)	0.151	1.15 (0.65, 2.01)	0.633
Anemic patients	0.636	1.41 (0.83, 2.41)	0.201	1.21 (0.82, 1.78)	0.328
ICU admission within 24 hours‡
Non-anemic patients	0.862	1.62 (0.97, 2.69)	0.065	1.53 (1.11, 2.11)	0.009
Anemic patients	0.876	0.91 (0.59, 1.40)	0.658	0.94 (0.71, 1.27)	0.702

^*Results are from multivariable linear or logistic regression adjusting for age, sex, ASA physical status, procedure type, anesthesia type, history of cancer, lymphoma, leukemia, liver disease, renal disease, MI, CHF, stroke, pre-operative antiplatelet therapy, and pre-operative anticoagulant. The interaction p-value tests for equality in effect of incidental and non-incidental TCP in the given patient population.

^†Hospital length of stay is modelled on the log scale and estimates are for the multiplicative increase in geometric mean associated with TCP in the given patient population.

^‡Estimates are odds ratios for categorical variables and represent the increased risk of the given outcome associated with TCP in the given patient population.