Clinic and patient variation in intermediate clinical outcomes for type 2 diabetes: a multilevel analysis

BMC Primary Care

Table 2 Absolute and percent of variance in HbA1c, SBP and LDL-C attributable to clinic and patient levels

Random effects	Fully adjusted model
Random effects	HbA1c	SBP	LDL-C
Variance component	Variance (SD)	Variance (SD)	Variance (SD)
Clinic level	0.09 (0.30)	22.78 (4.77)	0.03 (0.16)
Patient level	3.63 (1.91)	285.63 (16.90)	1.05 (1.02)
Percent of total variance
Clinic level	2.4%	7.4%	2.4%
Patient level	97.6%	92.6%	97.6%
Intracluster correlation coefficient (ICC)	0.02	0.07	0.02

Two-level models with a random effect for clinic. All models were adjusted for patient and clinic characteristics. [Likelihood ratio test results showed that two-level models produced better fit compared to single-level models for all three outcomes]
HbA1c glycated haemoglobin, LDL-C low-density lipoprotein cholesterol, SBP systolic blood pressure, SD standard deviation

ISSN: 2731-4553