. 2017 Sep 14;19(10):1944–1951. doi: 10.1093/pm/pnx163

Table 4.

Model evaluating the contribution of epidural fat in explaining physical performance for pain groups as compared with controls

Stair Climb Performance (N = 91)	Block Statistics				Individual Predictor Statistics
	R²	_AdjR²	ΔR²	P*	b	SE	P
Block 1	0.32	0.30	–	<0.001
Age					0.113	0.02	<0.001
Male					4.40	0.10	<0.001
BMI					–0.76	0.34	<0.001
Block 2	0.46	0.42	0.14	<0.001
EFD					–0.93	0.18	0.212
LBP					5.62	1.11	<0.001
LBP + leg pain					1.46	1.15	0.208
Block 3	0.54	0.50	0.08	0.001
LBP × EFD					–0.91	0.25	<0.001
LBP + leg pain × EFD					–0.23	0.25	0.366

Block 1: covariates; Block 2: Block 1 + EFD + pain groups; Block 3: Block 2 + interaction terms.

Adj = Adjusted; b = regression coefficient; EFD = epidural fat diameter; LBP = low back pain.

*This P value is for the test in the change in R2, where the change in R2 represents the additional variance explained by given block, above and beyond the prior block(s): .