At 1 month after surgery, eyes with dimples were only observed in 55.3% of the patients (
Table 2). Compared to month 1, the occurrence of dimples increased significantly by 95.5% at month 3 (OR, 18.41; 95% CI, 3.72–91.16; adjusted
P < 0.001), 97.9% at month 6 (OR, 40.26; 95% CI, 3.39–478.24; adjusted
P = 0.001), and 100% at month 12 after surgery in multiple pairwise comparisons with Tukey's adjustment in multivariable GEE models (
Supplementary Table S4). Similarly, the occurrence of eyes with bidirectional dimples, including uncomplicated and complicated bidirectional dimples, was 38.3% at month 1, and it increased to 74.6 % by month 3 but plateaued at 81.3% by month 6 and 87.5% by month 12. Compared to month 1, bidirectional dimples were more frequently observed at month 3 (OR, 5.32; 95% CI, 1.69–16.73; adjusted
P < 0.001), month 6 (OR, 7.27; 95% CI, 1.92–27.55; adjusted
P < 0.001), and month 12 (OR, 12.79; 95% CI, 2.61–62.66; adjusted
P < 0.001). However, the occurrence of complicated bidirectional dimples did not differ between postoperative months 1 (29.8%) and 3 (46.3%) (adjusted
P = 0.317). They were observed in 64.6% of the eyes at month 6 and in 59.4% of the eyes at month 12. The increase was statistically significant for both months 6 (OR, 4.21; 95% CI, 1.35–13.13; adjusted
P = 0.006) and 12 (OR, 3.58; 95% CI, 1.03–12.48; adjusted
P = 0.043) as compared to month 1.