Table 1 Variables extracted from the EHR

Demographics

Laboratory values

    • Age at surgery

• Date of initial visit

    • Triglycerides

    • Gender

• Date of surgery

    • High density lipoprotein cholesterol (HDL)

    • Race

• Length of stay

    • Low density lipoprotein cholesterol-calculated (LDL)

Clinical measurements

    • HbA1c

    • Weight

• BMI

    • Insulin

    • Height

• Waist circumference

    • Albumin

Diagnoses

    • Total Bilirubin

    • Most common co-morbid conditions identified

    • Alkaline Phosphatase

    • Hypertension

• Disorder of back

    • Aspartate aminotransferase (AST)

    • Diabetes

• Hypoglycemia

    • Alanine aminotransferase (ALT)

    • Hypercholesterolemia

• Ovarian dysfunction

    • Protein

    • General symptoms

• Chronic IHD

    • Blood urea nitrogen (BUN)

    • Depression

• Allergic rhinitis

    • Creatinine

    • Osteoarthrosis

• Invertebral disc disorder

    • Sodium

    • Hypothyroidism

• Respiratory symptoms

    • Potassium

    • Asthma

• Neurotic disorders

    • Chloride

    • Affective psychoses

• Nondependent drug abuse

    • CO₂

    • Disorder of soft tissue

• Adjustment reaction

    • Glucose

    • Disease of esophagus

• Migraine

    • Calcium

Medications

    • Glomerular filtration rate-estimated (GFR)

    • Most common medication subclasses identified included

    • Thyroid stimulating hormone (TSH)

    • SSRIs^a

• Biguanides

    • Iron

    • NSAIDs^b

• Proton pump inhibitors

    • Iron binding capacity

    • ACE Inhibitors^c

• Statins

    • Transferrin

    • Loop Diuretics

• Salicylates

    • Ferritin

    • Thyroid hormones

• Sympathomimetics

    • White blood cell count

    • Beta blockers

• Opioid combinations

    • Red blood cell count

    • Sulfonylureas

• Insulin

    • Hemoglobin

    • Thiazides

• Insulin sensitizing agents

    • Hematocrit

    • Antihistamines

• Benzodiazepines

    • Mean cell volume (MCV)

    • Antihypertensive combos

• Nasal steroids

    • Mean cell hemoglobin (MCH)

    • Chol absorption inhibitor

• Multivitamins

    • Mean cell hemoglobin concentration (MCHC)

    • Calcium channel blocker

• Cough/Cold/Allergy combo

    • Platelet count

    • Steroid inhalants

• ARBs^e

    • Mean platelet volume (MPV)

    • SNRIs^d

• Anticonvulsants

    • Red cell distribution width (RDW)

    • Central muscle relaxants

• H-2 Antagonists^f

    • Nitrates

• Fibric acid

    • Anti-platelet aggregation

• Coumarin anticoagulant

    • Non-narcotic analgesics

• Tricyclic agents