Skip to main content

Table 2 The equations for nomograms The fitted parameters (5, 10, 25, 50, 75, 90, 95 percentiles) for the nomograms of maximum and average flow rates against voided volume for boys and girls. The parameter values substitute into the general equation: Sqrt (Q-max or Q-ave) = A × log (Sqrt (vv)) + B for Boys Log (Q-max) = A × log (vv) + B for Girls Sqrt (Q-ave) = A × log (vv) + B for Girls

From: Uroflowmetry nomogram in Iranian children aged 7 to 14 years

Percentiles Boys Girls
   Q-max Q-Ave Q-max Q-Ave
5th A +0.155 +0.087 +0.55 +0.51
  B +1.22 +0.82 -0.21 +0.48
10th A +0.164 +0.093 +0.63 +0.58
  B +1.39 +0.92 -0.36 -0.65
25th A +0.189 +0.124 +0.54 +0.67
  B +1.59 +0.99 +0.27 -0.69
50th A +0.229 +0.131 +0.38 +0.82
  B +1.67 +1.25 +1.23 -1.09
75th A +0.245 +0.138 +0.28 +0.85
  B 2.11 +1.53 +1.90 -0.89
90th A +0.207 +0.14 +0.33 +0.86
  B +3.06 +1.87 +1.87 -0.65
95th A +0.179 +0.134 +0.24 +0.73
  B +3.77 +2.29 +2.39 +0.33