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Table 3 Age-standardized rates (per 100 populations) and standardized rate ratios for cataract-related visits in people aged 40 years and older, Prince Edward Island, Canada, 2010–2012

From: Policy implications of regional variations in eye disease detection and treatment on Prince Edward Island: a repeated cross-sectional analysis, 2010–2012

Year; region Number of visits Rate (95% CI)a SRR (95% CI)
2010
 Charlottetown 769 3.41 (3.17, 3.65) Ref.
 Summerside 306 3.06 (2.72, 3.40) 0.90 (0.79, 1.02)
 Prince 418 2.59 (2.34, 2.83) 0.76 (0.68, 0.85)
 Kings & Queens 629 2.76 (2.54, 2.97) 0.81 (0.73, 0.90)
 Stratford 116 2.96 (2.42, 3.50) 0.87 (0.72, 1.04)
2011
 Charlottetown 1000 4.43 (4.15, 4.70) Ref.
 Summerside 362 3.62 (3.25, 3.99) 0.82 (0.73, 0.92)
 Prince 549 3.40 (3.11, 3.68) 0.77 (0.69, 0.85)
 Kings & Queens 746 3.27 (3.04, 3.51) 0.74 (0.67, 0.81)
 Stratford 144 3.72 (3.11, 4.33) 0.84 (0.71, 0.99)
2012
 Charlottetown 1017 4.50 (4.22, 4.78) Ref.
 Summerside 344 3.43 (3.07, 3.79) 0.76 (0.68, 0.86)
 Prince 555 3.43 (3.15, 3.72) 0.76 (0.69, 0.84)
 Kings & Queens 779 3.43 (3.19, 3.67) 0.76 (0.69, 0.84)
 Stratford 166 4.29 (3.63, 4.94) 0.95 (0.81, 1.12)
  1. Abbreviations: CI confidence intervals, Ref reference, SRR Standardized rate ratio
  2. Regions were defined based on distinctive forward sortation areas (first 3 digits of the postal code)
  3. aRates were age-standardized to the 2011 Prince Edward Island population
  4. P < 0.05 for rates in Prince and Kings & Queens compared to Charlottetown in 2010, 2011 and 2012; p < 0.05 for rates in Summerside compared to Charlottetown in 2011 and 2012, but not 2010; p > 0.05 for rates in Stratford compared to Charlottetown for all years examined except 2011