Skip to main content

Table 1 Description of sample and univariate results

From: Factors affecting perception of the normal pediatric appendix on sonography

CharacteristicsNormal appendix N = 60Appendix not visualized N = 67p value
Patient sex
 Male n (%)27 (45.0)24 (35.8)0.292
 Female n (%)33 (55.0)43 (64.2)0.113
Patient age (mean ± SD)12.5 ± 3.511.2 ± 4.70.001
US time in minutes (mean ± SD)29.1 ± 15.520.4 ± 12.6< 0.001
Experience in years (median, 25th and 75 percentile)15 (9, 15)8 (3, 14) 
Expertise
 Technician n (%)54 (91.5)35 (53.8)< 0.001
 Junior residents ≤ 3 n (%)3 (5.1)20 (30.8) 
 Senior residents 4+ n (%)2 (3.4)10 (15.4) 
  1. Numbers do not always add up to overall totals due to small amounts of missing data
  2. p values are based on the Chi-square test (sex), independent samples t-test (patient age as continuous, US time in minutes) and the Mann–Whitney U (experience in years)