Table 4.
Multivariate Analyses Evaluating Change in Each Measure Compared to the No Surgery Group for Previously Unoperated Participants†
| Change in: | Surgical Status by Round 2
|
|
|---|---|---|
| Unilateral Surgery | Bilateral Cataract Surgery | |
| Visual Acuity (logMAR improvement) | 0.04* | 0.13* |
| Contrast Sensitivity (letters) | 0.16 | 0.93* |
| Reading Speed (words per minute) | 11.6* | 31.1* |
| Mobility: | ||
| Average Mobility Score (z-score) | −0.18* | 0.18 |
| Walking Speed (z-score) | −0.18* | 0.15 |
| Get Up and Go Speed (z-score) | −0.19* | 0.01 |
| Going Up Stairs Speed (z-score) | −0.24* | 0.22 |
| Going Down Stairs Speed (z-score) | −0.26 | 0.08 |
| Overall Stair Speed (z-score) | −0.27* | 0.28 |
| Activities of Daily Vision Scale (ADVS): | ||
| Overall | −5.0* | 4.9* |
| Distance | −4.8* | 2.2 |
| Near | −4.7 | 4.5 |
| Glare | −8.4* | 5.5* |
| Day Driving | −9.0* | −1.0 |
| Night Driving | −8.4* | 5.9 |
All values shown are the change compared to the reference group after adjusting for the variables as discussed below. Visual acuity was measured with best correction using both eyes together and is shown in logarithm of the Minimum Angle of Resolution (logMAR). Contrast sensitivity is the number of correct letters in the better-seeing eye with correction on a Pelli-Robson chart. The 0.21 degree text, the size of newspaper print, was used for the reading speed. Z-score is the difference between the measured time and the baseline mean time for the entire study population divided by the baseline standard deviation, so a positive z-score denotes better performance.
Statistically significant difference compared to no surgery group (p-value < 0.05)
For each variable, the regression model controlled for sex, age, race, education, comorbidity, Mini-Mental State Examination, depression, and the baseline value for the outcome being evaluated. The walking score also included a spline term to adjust for baseline walking speed.