Table 3. Comparison of patient comorbidities between non-referral and referral groups
Non-referral groupReferral groupP value
Diagnoses , n (%)
 Diabetes mellitus837 (70.99)260 (72.83)0.544
 Hypertension1165 (98.81)348 (97.48)0.117
 Hyperlipidaemia1155 (98.00)351 (98.30)0.837
 Gout233 (19.80)65 (18.21)0.566
 Ischaemic heart disease296 (25.11)91 (25.49)0.939
 Peripheral vascular disease93 (7.89)25 (7.00)0.662
 Stroke268 (22.73)72 (20.17)0.343
 Dementia93 (7.89)25 (7.00)0.662
Mean number of comorbid diagnoses (SD) 4.51 (1.01)4.46 (1.00)0.443
Mean number of comorbid diagnoses by age group (SD)
 65–694.54 (1.01)4.34 (1.01)0.136
 70–744.48 (1.01)4.61 (1.01)0.352
 75–794.55 (1.01)4.41 (1.01)0.218
 80–844.52 (1.01)4.31 (1.01)0.172
 85–894.50 (1.01)4.71 (1.01)0.258
 ≥904.39 (1.01)4.83 (1.01)0.158
Mean blood pressure (SD) a
 Systolic133.33 (16.24)134.17 (14.54)0.357
 Diastolic67.71 (9.41)68.55 (8.94)0.125
Mean HbA1c (SD) b 7.35 (1.34)7.46 (1.46)0.261
  • P value is taken from χ2 test for categorical, unpaired t-test for continuous variables, and two-way ANOVA for the mean number of comorbid diagnoses by age group.aBlood pressure data available for 1532 patients: 1177 in non-referral and 355 in referral group; bHbA1c data available for 1047/1097 patients with diabetes mellitus: 795 in non-referral and 252 in referral group