. Author manuscript; available in PMC: 2017 Oct 1.

Published in final edited form as: J Pediatr Surg. 2016 Mar 12;51(10):1655–1660. doi: 10.1016/j.jpedsurg.2016.03.005

Table 2.

Characteristics of patients with high clinical suspicion for appendicitis based on equivocal or unequivocal right lower quadrant ultrasounds in 2014

Characteristic	Overall (N = 825)	Equivocal US (N = 530)	Unequivocal US (N = 295)	p-value
Race
White	516 (62.6%)	334 (63.0%)	182 (61.7%)	0.884
Black	214 (25.9%)	137 (25.9%)	77 (26.1%)
Other	95 (11.5%)	59 (11.1%)	36 (12.2%)
Sex
Male	361 (36.8%)	193 (36.4%)	168 (57.0%)	<0.001*
Female	464 (56.2%)	337 (63.6%)	127 (43.0%)	<0.001*
Age, mean ± sd	11.4 ± 3.6	11.7 ± 3.7	10.8 ± 3.4	0.001*
PAS Score, mean ± sd	6.5 ± 1.8	6.2 ± 1.8	6.9 ± 1.7	<0.001*
Imaging Pathway
US with CT	137 (16.6%)	117 (22.1%)	20 (6.8%)	<0.001*
US only	688 (83.4%)	413 (77.9%)	275 (93.2%)	<0.001*

CT – computed tomography, PAS – pediatric appendicitis score, sd = standard deviation, US - ultrasound