Catquest-9SF functioning over a decade – a study from the Swedish National Cataract Register

Table 6 Linear stepwise regression analysis of all data, 2008–2018 inclusive

Variable	Unstandardized beta	Standard error	Standardized beta	Significance	95% CI, lower	95% CI, upper
BCVA in the operated eye	4.138	0.063	0.331	0.000	4.014	4.262
Ocular comorbidity^a	0.414	0.024	0.087	0.000	0.367	0.461
Second-eye surgery	−0.362	0.023	−0.076	0.000	−0.406	−0.317
Sex	−0.178	0.023	−0.038	0.000	−0.222	−0.134
Capsule complication	0.483	0.122	0.019	0.000	0.244	0.722
Age	−0.004	0.001	−0.013	0.007	−0.006	−0.001
Surgical difficulty^b	−0.112	0.044	−0.012	0.011	−0.198	−0.026

Dependent variable: postoperative person Rasch score. Independent variables: postoperative best corrected visual acuity (logMAR) in the operated eye, age, sex (coded as female 0, male 1), ocular co-morbidity (coded as yes 1, no 0), surgical difficulty (coded as yes 1, no 0), second-eye surgery (coded as yes 1, no 0), and capsule complication (coded as yes 1, no 0)
BCVA = best corrected visual acuity; logMAR = logarithm of the minimum angle of resolution; 95% CI = 95% confidence interval
^aOcular comorbidity includes age-related macular degeneration, glaucoma, diabetic retinopathy, and “other” sight threatening ocular comorbidity
^bSurgical difficulty includes small pupil with need of stretching, white or dense cataract with need of staining, need of capsular hooks and capsular tension ring

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