Table 4 Comparison of normal “Bell Shaped” and abnormal urination curves on PF studies and non-invasive EMG uroflowmetry tests
From: A comparative study between EMG uroflowmetry with and without a catheter in children
Abnormal curve (PF /non-invasive EMG uroflowmetry) | Normal curve (PF /non-invasive EMG uroflowmetry) | Sensitivity (95% CI) | Specificity (95% CI) | Positive predictive value (95% CI) | Negative predictive value (95% CI) | |
|---|---|---|---|---|---|---|
All children | 31/37 | 13/33 | 83% (68-93) | 39% (23-57) | 61% (53-67) | 68% (48-83) |
Sex, males | 11/12 | 3/11 | 91% (62-22) | 27% (6-60) | 57% (47-67) | 75% (26-96) |
Sex, females | 20/25 | 10/22 | 80% (59-93) | 45% (24-67) | 62% (52-71) | 66% (44-83) |
Age 4-9 years | 16/20 | 6/16 | 80% (56-94) | 37% (15-64) | 61% (50-71) | 60% (33-81) |
Age 10-18 years | 15/17 | 7/17 | 88% (63-98) | 41% (18-67) | 60% (49-69) | 77% (45-93) |