Table 2 Demographics, percentages and clinical findings of the subjects in both groups
|  | Regression group (N = 56) | Non-regression (N = 180) | \( \varvec{t}/{\varvec{x}}^{2}/\varvec{Z}\) | P-value |
|---|---|---|---|---|
Age at surgery, n(%) | Â | Â | <0.001 | 0.975 |
<20 ≥ 20 | 24(42.9) 32(57.1) | 78(43.3) 102(56.7) |  |  |
Postoperative period (years), n(%); |  |  | 17.450 | < 0.001 |
5–10 | 26 (46.4) | 135 (75.0) |  |  |
11–16 | 30 (53.6) | 45 (25) |  |  |
Types of CRS, n(%) |  |  | 16.090 | < 0.001 |
Intrastromal ablations | 42 (75.0) | 169 (93.9) | Â | Â |
subepithelial ablations | 14 (25.0) | 11 (6.1) | Â | Â |
Preoperative SE(D), n(%); | Â | Â | 1.723 | 0.189 |
−0.5D～−3.0D | 23(41.1) | 92(51.1) |  |  |
−3.0D～−5.0D | 33(58.9) | 88(48.9) |  |  |
Dry eye test, n(%) | Â | Â | 0.025 | 0.873 |
Non-dry eye | 31 (55.4) | 98 (54.4) | Â | Â |
Dry eye | 25 (44.6) | 82 (45.6) | Â | Â |
Eye habits | Â | Â | Â | Â |
Weekly outdoor activity time, n(%) |  |  | 25.823 | < 0.001 |
≤ 5 h | 18(62.1) | 13(14.4) |  |  |
>5Â h | 11(37.9) | 77(85.6) | Â | Â |
Daily screen time, n(%) |  |  | 18.631 | < 0.001 |
≤5 h | 4(13.8) | 20(22.2) |  |  |
5 to 8Â h | 16(55.2) | 67(74.4) | Â | Â |
>8Â h | 9(31.0) | 3(3.4) | Â | Â |
Continuous near-work time, n(%) |  |  | 13.910 | < 0.001 |
>45Â min | 18 (62.1) | 22 (24.4) | Â | Â |
≤ 45 min | 11(37.9) | 68(75.6) |  |  |