Table 1 Description of sample and univariate results
From: Factors affecting perception of the normal pediatric appendix on sonography
Characteristics | Normal appendix N = 60 | Appendix not visualized N = 67 | p 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 ± 3.5 | 11.2 ± 4.7 | 0.001 |
US time in minutes (mean ± SD) | 29.1 ± 15.5 | 20.4 ± 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) | |