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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