Table 4.

Prevalence of microvascular and macrovascular complications in included studies, 2003–2011

Author	Year of study	Response rate (%)	Sample size	Age	Diabetes type	Time since diabetes diagnosis	Data source	Diagnostic method	Type of complication	Prevalence (%) Total
Kelliher et al. [28]	2003	-	6826	Adults	All	-	National blind registry	Visual acuity of <6/60 in better eye/visual field subtending angle of 20°/< less	Blindness due to diabetic retinopathy	4.7
Buckley et al. [29]	2009	-	723,551	≥20 years	All	-	Hospital discharge data	ICD-10 codes	Non-traumatic lower leg amputation	0.2
Marsden et al. [34]	Nov 2008-March 2009	72	1071	63 years (sd 13)	T1: 7.5 % T2: 92.3 %	15 years	Electronic & paper clinical notes & referral letters	- Risk classification score ACR 2.5–25 ACR >25 - - - -	Diabetic retinopathy Foot ulcer Microalbuminuria Proteinuria Myocardial Infarction Heart Failure Transient Ischemic Attack Stroke Total macrovascular	24.8 2.5 32.1 6.0 0.4 0.3 1.5 0.5 3.5
Hurley et al. [30]	Feb 2008- Sept 2009	68	563	64 years (sd 13.4)	T1: 10 % T2: 90 %	7.7 (8.2) years	Clinical foot examination & practice medical records	Scottish Intercollegiate Guidelines Network risk stratification system & previous doctor diagnosis	Documented diabetic neuropathy Foot ulceration Past amputation Neuropathy symptoms at examination	3.0 3.7 1.7 32
Farrell & Moran [31]	2010	-	309	-	T2	-	Chart review	-	Diabetic retinopathy Neuropathy Peripheral vascular disease Chronic kidney disease Cerebrovascular disease	6.5 12.3 12.9 5.5 5.2
Tracey et al. [32]	2009–2011	62	655	≥50 years	T2	5 (IQR 3–10) years	SR previous doctor diagnosis	-	Diabetic retinopathy Neuropathy Leg ulcer Nephropathy Proteinuria Total macrovascular	8.2 (6.2–10.9) 14.6 (11.4–18.2) 4.2 (2.8–6.4) 5.1 (3.4–7.6) 6.1 (4.3–8.6) 15.1 (12.2–18.4)
McHugh et al. [33]	2011	GP = 94 %; Screening uptake = 43 %	1542	65 years (sd 13)	T1: 4.9 % T2: 85.6 %	-	Eye examination & clinical records	Fundus 45° digital PASA-approved camera	Background (R1) Pre proliferative (R2) Proliferative (R3) Any diabetic retinopathy	21.5 (19.5–23.6) 3.4 (2.6–4.5) 0.7 (0.4–1.3) 25.6 (23.5–27.9)