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

Table 1 Demographics: patient and surgical characteristics

Characteristic		Total N = 3111
Characteristic		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 interval^b
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
Other^a	241/538 (44.8)	42.2–48.0
All specialties	1648 /3111 (52.9)	37.6–66.4

Incidence of un-indicated testing among surgical specialties
^aColorectal, gastrointestinal, oral maxillofacial surgery, head and neck surgery, orthopedic, trauma, transplant
^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
^cOrdering rates were significantly different among specialties (Freeman-Tukey transformed ANOVA, p value = 0.001)

ISSN: 2047-0525