Skip to main content

Advertisement

Table 2 ICC estimates for process of care outcomes

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

Quality of Care Indicator* N Average cluster size Proportion Ɨ ICC
All patients (n = 5140)
One blood pressure reading 5133 61 0.93 0.052
Two blood pressure readings 5129 61 0.75 0.111
Lipid profile 5133 61 0.78 0.076
Fasting blood glucose 5133 61 0.81 0.045
eGFR 5133 61 0.80 0.066
ACR 5133 61 0.36 0.122
Smoking status checked 5132 61 0.96 0.088
Waist circumference 5140 61 0.10 0.173
Patients with Hypertension (n = 3959)
One blood pressure reading 3959 47 0.95 0.045
Two blood pressure readings 3957 47 0.80 0.115
Anti-hypertensive medication 3959 47 0.94 0.015
Patients with Dyslipidemia (n = 4289)
Lipid profile 4289 51 0.83 0.050
Lipid lowering medication 4289 51 0.91 0.019
Patients with Diabetes (n = 2404)
HbA1c 2402 29 0.87 0.091
Glycemic Medication 2402 29 0.80 0.041
1 blood pressure reading 2404 29 0.93 0.063
2 blood pressure reading 2404 29 0.76 0.133
Lipid Profile 2404 29 0.81 0.094
Fasting blood glucose 2404 29 0.85 0.097
eGFR 2404 29 0.84 0.087
ACR 2404 29 0.56 0.167
Patients with Chronic Kidney Disease (n = 975)
eGFR 975 12 0.92 0.064
ACR 975 12 0.52 0.123
1 blood pressure reading 975 12 0.95 0.074
2 blood pressure readings 974 12 0.83 0.157
Patients with Coronary Artery Disease (n = 1573)
Medication 1573 19 0.89 0.017
1 blood pressure reading 1573 19 0.92 0.091
2 blood pressure readings 1572 19 0.77 0.137
Lipid profile 1573 19 0.75 0.104
Patients who smoke (n = 1082)
Smoking advice 1082 13 0.53 0.120
Smoking program 1082 13 0.08 0.148
Smoking cessation drug 1082 13 0.23 0.054
  1. *whether specified quality of care indicator was discussed, recommended, or performed during a one year timeframe, Ɨrepresents the proportion of patients that received the listed clinical manoeuvre.
  2. eGFR – Estimated Glomerular Filtration Rate; ACR – Albumin-to-Creatinine ratio; HbA1c – Hemoglobin A1c.