Patient characteristics and rates of inconclusive results
| Variables | Total (n=79) | Suction rectal biopsy (n=57) | Open strip biopsy (n=22) | P value |
| Gender, n (%) | 0.121 | |||
| Male | 49 (62.0) | 32 (56.1) | 17 (77.3) | |
| Female | 30 (38.0) | 25 (43.9) | 5 (22.7) | |
| Age, n (%) | ||||
| In months | 34 (6–64) | 30 (2–67) | 43 (25–61) | 0.096 |
| In years | 2 (0–5) | 2 (0–5) | 3 (2–5) | 0.161 |
| Neonates | 9 (11.4) | 9 (100.0) | 0 (0.0) | <0.001 |
| Thickness, median (range) | 3.0 (2.0–3.0) | 2.0 (2.0–3.0) | 3.0 (3.0–5.5) | <0.001 |
| Results, n (%) conclusive | ||||
| HD diagnosed (true positive) | 8 (10.1) | 6 (10.5) | 2 (9.1) | |
| HD excluded (true negative) | 59 (74.7) | 42 (73.7) | 17 (77.3) | |
| Total | 67 (84.8) | 48 (84.2) | 19 (86.4) | 1.000 |
| Inconclusive (false positive) | 12 (15.2) | 9 (15.8) | 3 (13.6) |
HD, Hirschsprung’s disease.