TABLE 3.
Linear regression analysis of AL elongation association with baseline data and RCRPS parameters.
| Group | Parameter |
Univariate model |
Multivariate model |
||
| Beta (95% CI) | P value | Beta (95% CI) | P value | ||
| OK | Age (year) | −0.070 (−0.106 to −0.034) | 0.001 | −0.044 (−0.078 to −0.011) | 0.014 |
| Gender (boys) | 0.035 (−0.105 to 0.174) | 0.628 | \ | \ | |
| Baseline AL (mm) | −0.189 (−0.275 to −0.103) | <0.001 | −0.066 (−0.161 to 0.029) | 0.183 | |
| Baseline SE (D) | 0.072 (0.006 to 0.138) | 0.040 | Removed | ||
| Half_x (mm) | 0.276 (0.154 to 0.398) | <0.001 | 0.186 (0.064 to 0.309) | 0.005 | |
| Half_y (D) | −0.037 (−0.189 to 0.116) | 0.640 | \ | \ | |
| Sum4 (D*mm2) | −0.011 (−0.017 to −0.004) | 0.003 | Removed | ||
| Sum7 (D*mm2) | −0.002 (−0.004 to 0.000) | 0.114 | \ | \ | |
| Half_x – PR (mm) | 0.145 (0.058 to 0.231) | 0.002 | Removed | ||
| MFCL | Age (year) | −0.045 (−0.076 to −0.014) | 0.008 | −0.045 (−0.076 to −0.014) | 0.008 |
| Gender (boys) | 0.016 (−0.086 to 0.118) | 0.757 | \ | \ | |
| Baseline AL (mm) | −0.015 (−0.092 to 0.062) | 0.710 | \ | \ | |
| Baseline SE (D) | 0.013 (−0.044 to 0.069) | 0.666 | \ | \ | |
| Half_x (mm) | 0.046 (−0.126 to 0.219) | 0.600 | \ | \ | |
| Half_y (D) | −0.014 (−0.087 to 0.060) | 0.716 | \ | \ | |
| Sum4 (D*mm2) | −0.002 (−0.006 to 0.002) | 0.395 | \ | \ | |
| Sum7 (D*mm2) | 0.000 (−0.001 to 0.001) | 0.453 | \ | \ | |
| Half_x – PR (mm) | 0.033 (−0.075 to 0.141) | 0.554 | \ | \ | |
| Combined data | Age (year) | −0.058 (−0.083 to −0.034) | <0.001 | −0.045 (−0.067 to −0.023) | <0.001 |
| Gender (boys) | 0.019 (−0.069 to 0.107) | 0.668 | \ | \ | |
| Baseline AL (mm) | −0.109 (−0.171 to −0.048) | 0.001 | −0.047 (−0.102 to 0.007) | 0.095 | |
| Baseline SE (D) | 0.050 (0.006 to 0.095) | 0.031 | Removed | ||
| Half_x (mm) | 0.209 (0.123 to 0.295) | <0.001 | 0.161 (0.082 to 0.241) | <0.001 | |
| Half_y (D) | 0.022 (−0.040 to 0.084) | 0.485 | \ | \ | |
| Sum4 (D*mm2) | −0.006 (−0.010 to −0.002) | 0.003 | Removed | ||
| Sum7 (D*mm2) | −0.001 (−0.002 to 0.000) | 0.290 | \ | \ | |
| Half_x – PR (mm) | 0.123 (0.060 to 0.186) | <0.001 | Removed | ||
CI, confidence interval; AL, axial length; RCRPS, relative corneal refractive power shift; SE, spherical equivalent, D, diopter; OK, orthokeratology; MFCL, multifocal soft contact lens; Combined data, OK and MFCL groups together; Half_x, the corneal eccentric location where RCRPS reached the half peak value; Half_y, half of the RCRPS peak value; Sum4, the integrated value of the RCRPS located within an area of 4-mm diameter; Sum7, the integrated value of the RCRPS located within an area of 7-mm diameter; PR, pupil radius; Removed, Based on the Akaike Information Criterion, the factor was not selected for analysis in the multivariate model. Bolded values indicate p < 0.05.