Table 2 Risk factors/indicators of the pre- to postoperative change in VA

From: The Cataract National Dataset electronic multi-centre audit of 55 567 operations: risk indicators for monocular visual acuity outcomes

Variable Adjusted difference in means (95% CI) a P-value
Age
 <60 0.00 <0.0001
 60–69 −0.29 (−0.40, −0.19)  
 70–79 −0.75 (−0.85, −0.66)  
 80–89 −1.33 (−1.43, −1.23)  
 90+ −2.18 (−2.37, −1.99)  
Gender
 Female 0.00 0.0003
 Male 0.10 (0.04, 0.15)  
Axial length b
 ≤22.37 −0.47 (−0.55, −0.39) <0.0001
 22.38–22.95 −0.12 (−0.20, −0.05)  
 22.96–23.47 0.00  
 23.48–24.18 0.05 (−0.02, 0.12)  
 ≥24.19 −0.06 (−0.13, 0.02)  
Any ocular comorbidity
 No 0.00 <0.0001
 Yes −0.52 (−0.63, −0.42)  
Age-related macular degeneration
 No 0.00 <0.0001
 Yes −0.94 (−1.10, −0.78)  
Diabetic retinopathy
 No 0.00 <0.0001
 Yes −0.97 (−1.19, −0.75)  
Amblyopia
 No 0.00 <0.0001
 Yes −1.16 (−1.46, −0.87)  
Corneal pathology
 No 0.00 <0.0001
 Yes −0.69 (−0.95, −0.43)  
High myopia
 No 0.00 0.0372
 Yes −0.27 (−0.52, −0.02)  
Previous vitrectomy
 No 0.00 <0.0001
 Yes −2.14 (−2.74, −1.53)  
Previous retinal detachment surgery
 No 0.00 0.0169
 Yes −0.47 (−0.86, −0.08)  
Brunescent or white cataract
 No 0.00 0.0012
 Yes 0.53 (0.21, 0.85)  
Pupil size at surgery
 Large 0.00 0.0136
 Medium 0.07 (−0.01, 0.15)  
 Small −0.19 (−0.36, −0.02)  
Inability to cooperate
 No 0.00 0.0027
 Yes −0.25 (−0.41, −0.09)  
Tamsulosin
 No 0.00 0.0495
 Yes 0.24 (0.01, 0.46)  
Posterior capsule rupture
 No 0.00 <0.0001
 Yes −1.12 (−1.47, −0.77)  
  1. Multiple regression analysis; N=40 625; R2 for model=0.69.
  2. aEffect size refers to LogMAR lines of change, eg, eyes with amblyopia experienced on average 1.16 LogMAR lines less improvement than those with no amblyopia after adjustment for baseline VA and other significant effects.
  3. bAxial length divided into quintiles.