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Table 5 Comparison of ICC clinical outcomes between single physician versus multiple physicians practices

From: Intracluster correlation coefficients for sample size calculations related to cardiovascular disease prevention and management in primary care practices

Clinical Outcome ICC ICC Ratio (Single/Multiple)
(Single Physician) (Multiple Physicians)
N = 50 N = 34
All patients
SBP 0.082 0.020 4.10
DBP 0.133 0.051 2.60
LDL 0.042 0.029 1.44
HDL 0.024 0.024 1
FBG 0.027 0.020 1.35
egfr 0.019 0.010 1.90
acr 0.000* 0.000* ---
Patients with Hypertension
sbp 0.086 0.020 4.30
dbp 0.130 0.042 3.10
Patients with Dyslipidemia
LDL 0.044 0.023 1.91
HDL 0.019 0.024 0.80
Patients with Diabetes
SBP 0.061 0.015 4.10
DBP 0.108 0.053 2.04
LDL 0.068 0.039 1.74
HDL 0.041 0.047 0.87
HbA1c 0.019 0.000 ---
FBG 0.017 0.034 0.50
egfr 0.016 0.018 0.89
Patients with Chronic Kidney Disease
egfr 0.060 0.029 2.07
SBP 0.092 0.055 1.67
DBP 0.131 0.078 1.68
Patients with Coronary Artery Disease
SBP 0.083 0.020 4.15
DBP 0.155 0.084 1.85
LDL 0.048 0.054 0.89
HDL 0.000* 0.038 ---
Patients who Smoke
SBP 0.008 0.000 ---
DBP 0.114 0.020 5.7
  1. *Negative ICCs were considered a result of sampling error and were set to zero SBP – Systolic Blood Pressure; DBP – Diastolic Blood Pressure; LDL – Low Density Lipoprotein; HDL – High Density Lipoprotein; FBG – Fasting Blood Glucose; eGFR – Estimated Glomerular Filtration Rate; ACR – Albumin-to-Creatinine ratio; HbA1c – Hemoglobin A1c.