Table 4.

Variation between public practices and between its prescribers for each subsequent multilevel model

Random effects (intercepts)	Empty model (95% CrI)	Multilevel Model 1: (95% CrI)	Multilevel Model 2: (95% CrI)	Multilevel Model 3: (95% CrI)
Practice
Variance	0.81 (0.13–4.95)	0.67 (0.12–3.67)	0.51 (0.05–4.82)	0.21 (0.001–43.59)
MOR	2.28 (1.4–7.67)	2.11 (1.37–5.78)	1.92 (1.24–7.46)	1.52 (1.03–422.31)
Prescriber
Variance	3.13 (1.9–5.18)	2.73 (1.78–4.18)	2.70 (1.72–4.25)	2.75 (1.72–4.38)
MOR	5.06 (3.53–8.03)	4.54 (3.39–6.51)	4.51 (3.33–6.6)	4.56 (3.33–6.8)
Practice & prescriber
Variance	3.94	3.39	3.21	2.96
MOR	6.16	5.40	5.16	4.83
Proportional change in variance (PCV) (%)
Practice	–	17.3	23.9	58.8
Prescriber	–	12.8	1.1	−1.9
Practice & prescriber	–	14.0	5.3	7.8

Note. MOR, median odds ratio; CrI, Credible interval