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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: World Neurosurg. 2012 Nov 24;81(1):165–172. doi: 10.1016/j.wneu.2012.11.068

Table 6.

Predictive Need for ICU-Level Care Depending on Univariate Analysis Risk Factors.

Risk Factors Overall
Risk Factor Patients with Risk
Factor in the Entire
Series		 Patients with Risk
Factor Requiring
ICU-Level Care		 Given Risk Factor What
is Likelihood of
Requiring the ICU?
Diabetes 37/400 (9.3%) 20/140 (14.3%) 20/37 (54.1%)
OR blood products 46/400 (11.5%) 22/140 (15.7%) 22/46 (47.8%)
Age > 65 86/400 (21.5%) 43/140 (30.7%) 43/86 (50.0%)
EBL ≥ 1000 20/400 (5.0%) 9/140 (6.4%) 9/20 (45.0%)
Surgery time > 8hrs 37/400 (9.3%) 13/140 (9.3%) 13/37 (35.1%)
NO RISK FACTORS 239/400 (59.8%) 66/140 (47.1%) 66/239 (27.6%)
Risk Factors For Reasons Other than IV BP Medication Infusion
Risk Factor Patients with Risk
Factor in the Entire
Series		 Patients with Risk
Factor Requiring
ICU-Level Care		 Given Risk Factor
What is Likelihood of
Requiring the ICU?
Diabetes 37/400 (9.3%) 8/33 (24.2%) 8/37 (21.6%)
OR blood products 46/400 (11.5%) 8/33 (24.2%) 8/46 (17.4%)
ASA Classes 3 & 4 151/395 (38.2%) 23/33 (69.7%) 23/151 (15.2%)
EBL ≥ 1000 20/400 (5.0%) 5/33 (15.2%) 5/20 (25.0%)
Surgery time > 8hrs 37/400 (9.3%) 3/33 (9.1%) 3/37 (8.1%)
NO RISK FACTORS 190/400 (47.5%) 5/33 (15.2%) 5/190 (2.6%)