Table 1 Incidence of moderately-severe NPDR or worse (ETDRS level ≥47), per 100 Gloucestershire people with diabetes.

From: Epidemiology of moderately severe and severe non-proliferative diabetic retinopathy in South West England

Number of Gloucestershire PWD at risk* of developing incident moderately severe NPDR or worse in at least one eye during the respective year

  

2013

2014

2015

2016

IRR (95% CI) for trend over time (increment of the calendar year)

Overall±

23,860

25,683

27,175

29,393

T1DM

1432

1578

1685

1761

T2DM

22,410

24,030

25,394

27,501

New ETDRS level 47 or worse in at least one eye

Overall

n

136

119

119

103

0.86

Incidence

0.57

0.46

0.44

0.35

(0.79–0.93)

(95% CI)

(0.48–0.67)

(0.39–0.55)

(0.37–0.52)

(0.29–0.43)

p < 0.001

T1DM

n

31

26

30

32

0.96

Incidence

2.2

1.7

1.8

1.8

(0.81–1.12)

(95% CI)

(1.5–3.1)

(1.1–2.4)

(1.2–2.6)

(1.3–2.6)

p = 0.587

T2DM

n

105

93

89

71

0.83

Incidence

0.47

0.39

0.35

0.26

(0.76–0.91)

(95% CI)

(0.39–0.57)

(0.32–0.47)

(0.28–0.43)

(0.20–0.33)

p < 0.001

  1. PWD people with diabetes, NPDR non-proliferative diabetic retinopathy, T1DM Type 1 diabetes mellitus, T2DM Type 2 diabetes mellitus, CI confidence interval;
  2. *Those at risk were those on the GDESP register during the respective year, with at least one assessment that year and where all prior assessments showed DR of ETDRS level <47 in both eyes.
  3. ±Includes those with ‘other’ and ‘unknown’ diabetes types.
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