Table 1

Characteristics of the patients and surgeon’s experience identified in the Swedish National Cataract Register and the Swedish Macula Register

VariableMean (range)Prevalence % (n)Missing data % (n)
Phacoemulsification cataract surgery data in 907 499 eyes in 572 536 patients >20 years age, according to the Swedish National Cataract Register for the period 1 January 2010–30 June 2018 (except for axial length (collected 2015–2017), uveitis, previous refractive surgery, previous vitrectomy (collected since 2018) and indication for surgery (collected 2012–2017).
Age at time of surgery (years)74.4 (20–109)0% (0)
Best-corrected visual acuity (LogMAR)0.45 (–0.3–2)<0.1% (398)
Axial length (mm)23.73 (15 – 35)61.0% (553 492)
Surgeon’s experience (no. of surgeries)3670 (1 – 20 784)<0.1% (747)
Sex (male/female)40.3% (365 379)/59.7% (542 120) eyes0% (0)
58.9% (337 217)/41.1% (235 319) patients
Any ocular comorbidity37.6% (341 543)0% (0)
 Pseudoexfoliation10.4% (76 436)19.4% (176 440)
Data collected since 2012
 Glaucoma8.6% (77 907)0% (0)
 Macular degeneration15.0% (135 941)0% (0)
 Diabetic retinopathy4.2% (37 956)0% (0)
 Previous intravitreal therapy0.38% (3451)n/a
 Corneal endothelial degeneration2.4% (21 673)0% (0)
 Uveitis0.3% (185)92.8% (842 150)
 Previous refractive surgery0.6% (405)92.8% (842 150)
 Previous vitrectomy0.7% (462)92.8% (842 150)
Any intraoperative measure6.8% (57 879)0% (0)
 Rhexis hooks0.9% (8347)0% (0)
 Blue staining3.3% (29 739)0% (0)
 Mechanical pupil dilation3.3% (29 592)0% (0)
Indication for surgery
 Poor visual acuity99.1% (660 025)26.6% (241 708)
 Anisometropia3.7% (24 898)26.6% (241 708)
 Elevated IOP1.2% (8006)26.6% (241 708)
 ‘Other’ visual disturbance1.1% (7595)26.6% (241 708)
 ‘Other’ indication1.3% (8538)26.6% (241 708)
Intraoperative complication0.86% (7832)<0.1% (1)
Intravitreal therapy data from the Swedish Macula Register for 3451 eyes of 3168 patients, found after cross referencing.
Age at time of intravitreal therapy (years)81.0 (33–100)0% (0)
Sex (male/female)37.3% (1290)/62.7% (2161) eyes0% (0)
37.9% (1201)/62.1% (1967) patients
  • *‘Prevalence’ indicates the percentage (and number (n)) of eyes with valid data entries. ‘Missing data’ indicates the percentage (and number (n)) of eyes with missing data.

  • IOP, intraocular pressure.