Table 1.
Patient and operation characteristics of the cataract surgeries performed 6 weeks prior (SIP-6: week 6–11) to the surgery reduction period and 6 weeks after surgery reduction period (SIP+6: week 20–25) in 2020 and of week 6–11 and week 20–25 in 2019
| Cataract operations 2020 | Cataract operations 2019 | |||
|---|---|---|---|---|
| Characteristic | SIP-6 Operations week 6–11 (N = 15,141) |
SIP+6 Operations week 20–25 (N = 15,544) |
Operations week 6–11 (N = 21,270) |
Operations week 20–25 (N = 19,087) |
| Age (y) | 73.2 | 72.8 | 72.9 | 72.85 |
| Gender N (%) | ||||
| Male | 6359 (42) | 6684 (43) | 9146 (43) | 8207 (43) |
| Female | 8782 (58) | 8860 (57) | 12,124 (57) | 10,880 (57) |
| Risk factors for complicationsa N (%) | 1469 (9.7) | 1648 (10.6) | 2893 (13.6) | 2310 (12.1) |
| Factors restricting patient’s visionb N (%) | 3392 (22.4) | 3435 (22.1) | 5169 (24.3) | 4676 (24.5) |
| Postoperative BCVAc 0.50 N(%) | 14,596 (96.4) | 15,047 (96.8) | 20,483 (96.3) | 18,381 (96.3) |
| Operations with improved vision, ≥ 1 linec N (%) | 14,277 (94.3) | 14,720 (94.7) | 20,079 (94.4) | 18,075 (94.7) |
| Operations with absolute refractive error < 1(D) from target refraction N (%) | 14,308 (94.5) | 14,736 (94.8) | 20,058 (94.3) | 18,037 (94.5) |
| Average absolute error from target refraction | 0.38 | 0.37 | 0.39 | 0.39 |
BCVA: best-corrected visual acuity
aPrevious corneal refractive surgery, previous vitrectomy, mature cataract, pseudoexfoliation, corneal opacity, small pupil, remainder
bGlaucoma, age-related macular degeneration, diabetic retinopathy, amblyopia, uveitis, remainder
cSnellen chart