Variable

Visual acuity ≥0.55 Odds ratio (95% CI) p-value

Visual acuity ≤0.05 Odds ratio (95% CI) p-value

Year of operation (2002-2010)

1.20 (1.17-1.23)

<0.0001

0.96 (0.94-0.99)

0.002

Sex (female versus male)

0.94 (0.82-1.07)

0.32

0.86 (0.76-0.97)

0.017

Eye disease (No versus Yes)

1.73 (1.53-1.97)

<0.0001

0.67 (0.60-0.76)

<0.0001

General disease (No versus Yes)

0.67 (0.59-0.76)

<0.0001

1.12 (0.99-1.28)

0.077

Age (≥80 years)

≤59

60-69

70-79

1

2.01 (1.60-2.51)

2.15 (1.77-2.60)

1.99 (1.67-2.38)

0.022

<0.0001

0.002

1

0.94 (0.79-1.11)

0.65 (0.56-0.76)

1.73 (1.45-2.07)

0.176

<0.0001

<0.0001

Table 2: The probability of having visual acuity of better than 0.55 or worse than 0.05 for first eye surgeries.