Influence of Institution-Based Factors on Preoperative Blood Testing Prior to Low-Risk Surgery: A Bayesian Generalized Linear Mixed Approach

Table 2

Odds ratio for patient and institutional factors.

Variables	OR [95% HPD interval]
Patient factors
Age	1.09 [1.07 to 1.11]
Sex (female)	1.03 [0.99 to 1.07]
CCI	1.84 [1.77 to 1.92]
Antiplatelet	1.40 [1.23 to 1.63]
Anticoagulant	3.57 [2.22 to 5.61]
ACEI/ARB	1.53 [1.42 to 1.66]
Diuretics	1.40 [1.15 to 1.69]
Chemotherapy	1.55 [1.16 to 2.09]
Type of anesthesia
General anesthesia	5.42 [4.85 to 6.03]
Regional anesthesia	3.14 [2.89 to 3.44]
Sedation	2.19 [2.05 to 2.34]
Unknown	0.63 [0.58 to 0.66]
Ophthalmologic procedure	1.58 [1.47 to 1.69]
Outpatient	0.37 [0.35 to 0.39]
Institutional factors
Hospital with ≥100 beds	2.64 [2.53 to 2.75]
Teaching hospital	0.71 [0.66 to 0.77]
Number of operations	1.15 [1.13 to 1.17]

CEI, angiotensin-converting enzyme inhibitor; ARB, angiotensin-receptor blocker; CCI, Charlson comorbidity index; HPD, highest posterior density; OR; odds ratio. Notes. The posterior mean of each parameter was used as the model coefficient, and these values were expressed as odds ratios = odds ratio).