Table 1

Baseline demographic data

 Type of diabetes
Missing (%)Type 1Type 2
N186118 197
Age*40.6 (17.8)67.1 (12.5)
Sex
 Male1017 (54.7%)9896 (54.4%)
 Female844 (45.4%)8301 (45.6%)
Duration (years)†0.116.4 (7.40, 28.3)6.52 (2.93, 11.3)
HbA1c† (mmol/mol)1.274.0 (62.0, 87.0)54.0 (48.0, 65.0)
Cholesterol value (mmol/L)*1.04.58 (1.28)4.25 (1.05)
Systolic BP (mm Hg)*0.9131.0 (16.3)134.8 (15.7)
Diastolic BP*0.974.4 (10.1)74.7 (10.1)
Overall SIMD 2012 score†1.014.1 (9.78, 28.0)14.8 (9.91, 29.0)
 Health†−0.18 (−0.58, 0.43)−0.87 (−0.51, 0.50)
 Education skills and training†−0.14 (−0.63, 0.54)−0.08 (−0.64, 0.60)
 Housing†15.1 (9.66, 25.2)15.8 (10.1, 26.4)
 Geographic access†16.3 (7.2, 30.8)15.0 (6.15, 27.9)
 Crime†260.0 (140.0, 543.0)284.0 (148.0, 548.0)
Retinopathy5.6173317 226
 No retinopathy758 (43.7%)13 184 (76.5%)
 With retinopathy975 (56.3%)4042 (23.5%)
  BDR mild794 (45.8%)3656 (21.2%)
  BDR observable63 (3.6%)208 (1.2%)
  BDR referable54 (3.1%)104 (0.6%)
  Proliferative retinopathy64 (3.7%)74 (0.4%)
Maculopathy8.9161916 667
 No maculopathy1146 (70.8%)15 479 (92.9%)
 With maculopathy473 (29.2%)1188 (7.1%)
  Observable maculopathy91 (5.6%)165 (1.0%)
  Referable maculopathy382 (23.6%)1023 (6.1%)
  • *Data presented as mean (SD).

  • †Data presented as median (25th and 75th quartile).

  • BDR, background diabetic retinopathy; BP, blood pressure; HbA1c, glycated haemoglobin; SIMD, Scottish Index of Multiple Deprivation.