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Table 3 Intra-cluster correlation coefficients for intermediate clinical outcomes

From: Intra-cluster correlation coefficients in primary care patients with type 2 diabetes and hypertension

Intermediate clinical outcomesNumber, NAverage cluster sizeMean (SD) or n (%)ICC95% CI
T2D PATIENTS WITH OR WITHOUT HYPERTENSION (N = 6722)
 HbA1c, %62081558.3 (2.2)0.020.01, 0.03
 HbA1c ≤ 7%62081552135 (34.4)0.010.002, 0.02
 HbA1c ≤ 8%62081553291 (53.0)0.010.002, 0.02
 Systolic BP, mmHga6712168137.8 (17.1)0.080.06, 0.13
 Diastolic BP, mmHga671216877.8 (9.8)0.080.05, 0.12
 BP ≤ 130/80 mmHg67121681936 (28.8)0.090.05, 0.13
 BP ≤ 135/75 mmHg67121681757 (26.2)0.060.03, 0.09
 BP ≤ 140/80 mmHg67121682991 (44.6)0.080.05, 0.12
 Serum creatinine (μmol/L)645516288.6 (69.7)0.010.01, 0.02
 TC (mmol/L)63601595.1 (1.2)0.030.02, 0.06
 LDL-C (mmol/L)56241413.0 (1.1)0.030.02, 0.05
 LDL-C ≤ 2.6 mmol/L56241412191 (39.0)0.020.01, 0.03
 HDL-C (mmol/L)54921411.3 (0.4)0.030.02, 0.05
 Triglycerides (mmol/L)63351591.8 (1.2)0.010.01, 0.03
PATIENTS WITH HYPERTENSION (N = 5014)
 Systolic BP, mmHga5004126137.8 (17.0)0.080.05, 0.13
 Diastolic BP, mmHga500412678.7 (10.9)0.090.06, 0.14
 BP < 140/90 mmHg [15]50041262644 (52.8)0.050.02, 0.07
 Serum creatinine (μmol/L)473811983.2 (64.6)0.010.01, 0.03
 TC (mmol/L)46791175.3 (1.1)0.030.02, 0.06
 LDL-C (mmol/L)3800953.2 (1.0)0.050.03, 0.09
 LDL-C ≤ 2.6 mmol/L3800951082 (28.5)0.030.01, 0.05
 HDL-C (mmol/L)3653941.4 (0.4)0.030.01, 0.05
 Triglycerides (mmol/L)46851181.5 (0.9)0.010.004, 0.02
  1. BP blood pressure, CI confidence interval, HbA1c glycated haemoglobin, HDL-C high-density lipoprotein cholesterol, ICC intra-cluster correlation coefficient, LDL-C low-density lipoprotein cholesterol, SD standard deviation, T2D type 2 diabetes, TC total cholesterol
  2. aSystolic BP and diastolic BP values are the average of two readings