. Author manuscript; available in PMC: 2022 Mar 1.

Published in final edited form as: Surgery. 2020 Sep 18;169(3):671–677. doi: 10.1016/j.surg.2020.07.045

Table II.

Characteristics of imputed variables with more than 1% missingness

Preoperative laboratory value	No. missing	Percent missing	Mean	SD
Albumin	70,527	31.6%	4.18	.493
Aspartate transaminase	57,124	25.6%	24.5	19.8
Alkaline phosphatase	53,216	23.8%	75.6	28.7
Bilirubin	53,207	23.8%	.786	.624
BMI (kg/m²)	21,823	9.8%	28.6	6.7
Blood urea nitrogen	18,573	8.3%	13	5.9
Sodium	15,051	6.7%	138	2.73
Creatinine	14,177	6.4%	.881	.475
Platelet	8,637	3.9%	238	64.5
Hematocrit	8,078	3.6%	41.08	4.461
White blood cell count	7,752	3.5%	11.707	4.264

BMI, body mass index; SD, standard deviation.