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Table 1 Demographics: patient and surgical characteristics

From: The incidence of un-indicated preoperative testing in a tertiary academic ambulatory center: a retrospective cohort study

Characteristic Total N = 3111
N (%)
Age years (range, mean, SD) 12.3 to 94.8 51.6 ± 16.5
Age (years) ≤35 587 (18.9)
  36—55 1153 (37.1)
  56—75 1143 (36.7)
  >75 228 (7.3)
Gender Male 1106 (36)
  Female 2005 (64)
ASA physical status 1 348 (11.2)
  2 1972 (63.4)
  3 782 (25.1)
  4 9 (0.3)
Surgical specialties and incidence of un-indicated testing
Surgical specialty Frequency (percent)c 95 % confidence intervalb
Endocrine oncologic 338/753 (55.1) 49.4–61.4
Gynecological 419/537 (78.0) 72.6–82.4
Otology 154/408 (37.5) 33.2–43.0
Plastic 199/408 (48.8) 43.3–53.3
Urology 220/467 (47.1) 41.1–53.9
Othera 241/538 (44.8) 42.2–48.0
All specialties 1648 /3111 (52.9) 37.6–66.4
  1. Incidence of un-indicated testing among surgical specialties
  2. aColorectal, gastrointestinal, oral maxillofacial surgery, head and neck surgery, orthopedic, trauma, transplant
  3. bFreeman-Tukey transformation among n = 6 batches of 4-week periods. Ninety-five percent confidence intervals calculated from the Student 1-sample t test among batches, with the inverse transformation taken
  4. cOrdering rates were significantly different among specialties (Freeman-Tukey transformed ANOVA, p value = 0.001)