showed a trendP < 0.001
The Korean model showed a trend of underestimating age as chronological age increased (Institution 1: slope, -0.067; P < 0.001; Institution 2: slope, -0.056; P < 0.001).
The Korean model showed a trend of underestimating age as chronological age increased (Institution 1: slope, -0.067; P < 0.001; Institution 2: slope, -0.056; P < 0.001).