Table 3 The means of the predicted axial length vs. the true axial length
Groups | SER (D) | K-mean (D) | Age (years) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 to − 3.00 | −3.00 to − 6.00 | < − 6.00 | < 42.00 | 42.00 to 44.00 | > 44.00 | 6–10 | 11–14 | 15–18 | ||||
M | F | M | F | M | F | |||||||
No. of cases (%) | 518 (51.2) | 413 (40.9) | 80 (7.9) | 177 (17.5) | 515 (50.9) | 319 (31.6) | 219 (21.7) | 241 (23.8) | 206 (20.4) | 221 (21.8) | 66 (6.5) | 58 (5.8) |
Predicted AL (mm) | 24.46 | 25.25 | 26.47 | 25.78 | 25.01 | 24.38 | 24.57 | 24.56 | 25.12 | 25.12 | 25.69 | 25.74 |
True AL (mm) | 24.46 | 25.27 | 26.44 | 25.82 | 25.01 | 24.37 | 24.56 | 24.59 | 25.12 | 25.16 | 25.71 | 25.64 |
Error (mm) | 0 | −0.02 | 0.03 | − 0.04 | 0 | 0.01 | 0.01 | −0.03 | 0 | −0.04 | − 0.02 | 0.10 |
95% CI for error (mm) | [−0.03, 0.03] | [−0.02, 0.06] | [− 0.07, 0.14] | [− 0.10, 0.03] | [−0.03, 0.03] | [− 0.03, 0.04] | [− 0.04, 0.05] | [−0.07, 0.02] | [− 0.05, 0.06] | [− 0.08, 0.01] | [−0.11, 0.07] | [− 0.01, 0.22] |
95% CI for AL (mm) | [23.72, 25.18] | [24.81, 26.73] | [24.50, 30.14] | [23.16, 26.47] | [24.19, 25.82] | [23.54, 25.41] | [23.60, 25.92] | [22.82, 25.20] | [23.85, 26.59] | [23.10, 25.48] | [22.83, 27.52] | [25.39, 31.34] |
P value | 0.457 | 0.234 | 0.420 | 0.372 | 0.933 | 0.371 | 0.774 | 0.991 | 0.951 | 0.328 | 0.962 | 0.256 |