Table 1

Prediction errors for the subgroup data

Number Prediction error (dioptres) SD
MeanMedianRange
Axial length <20 mm112.632.610.–9.192.65
Axial length ⩾20 mm411.070.710.07–3.930.98
Corneal radii <7.3 mm121.601.360.24–4.001.3
Corneal radii ⩾7.3 mm401.320.760.07–9.191.68
Age at surgery <36 months122.562.290.24–9.192.5
Age at surgery ⩾36 months401.060.680.07–3.931.02