From: What factors explain the number of physical therapy treatment sessions in patients referred with low back pain; a multilevel analysis
Variance
(SE)
% of explained variance in relation to the intercept-only model
Practice level
2.38
(0.83)
22.2
Therapist level
0.13
(0.43)
93.2
Patient level
34.48
(1.20)
8.7
Total
36.98
13.4