Table 2.

Descriptive statistics including mean $\pm$ standard deviation for pain, spinal height, function, and median-interquartile range for centralization for visits 1 and 2 changes

Variables	RTE Group Before Session 1	RTE Group immediately after Session 1	Changes b/w before and after RTE	STE Group Before Session 1	STE Group immediately after Session 1	Changes b/w before and after STE
Treatment Session 1
NPRS (most)	5.80 $\pm$ 2.24	NA	NA	5.40 $\pm$ 1.64	NA	NA
NPRS (average)	2.67 $\pm$ 1.40	NA	NA	3.33 $\pm$ 1.35	NA	NA
NPRS (minimum)	1.53 $\pm$ 1.46	NA	NA	2.27 $\pm$ 0.80	NA	NA
NPRS (present)	2.40 $\pm$ 2.03	2.33 $\pm$ 1.88	0.07	3.47 $\pm$ 1.81	2.33 $\pm$ 1.35	1.14
Modified Oswestry (%)	19.60 $\pm$ 9	NA	NA	13 $\pm$ 7	NA	NA
Spinal Height (mm)	246.30 $\pm$ 45.97	248.37 $\pm$ 45.61	2.07	257.46 $\pm$ 49.02	262.00 $\pm$ 49.50	4.54
Centralization (median and IQR)	2 (IQR $=$ 3)	2 (IQR $=$ 1)	0	2 (IQR $=$ 2)	1 (IQR $=$ 1)	1
FABQ	23.6 $\pm$ 16.71	NA	NA	22.20 $\pm$ 11.24	NA	NA
	RTE Group Before Session 2	RTE Group immediately after Session 2	Changes b/w before and after RTE	STE Group Before Session 2	STE Group immediately after Session 2	Changes b/w before and after STE
Treatment Session 2
NPRS (most)	4.20 $\pm$ 2.46	NA	NA	2.60 $\pm$ 2.03	NA	NA
NPRS (average)	2.47 $\pm$ 1.96	NA	NA	1.47 $\pm$ 1.81	NA	NA
NPRS (minimum)	1.27 $\pm$ 1.39	NA	NA	0.83 $\pm$ 1.38	NA	NA
NPRS (present)	2.20 $\pm$ 2.31	1.93 $\pm$ 1.98	0.27	1.00 $\pm$ 1.13	0.87 $\pm$ 1.13	0.13
Modified Oswestry (%)	14.67 $\pm$ 11	NA	NA	6.40 $\pm$ 7	NA	NA
Spinal Height (mm)	245.50 $\pm$ 45.30	247.90 $\pm$ 44.93	2.39	258.17 $\pm$ 49.80	261.62 $\pm$ 49.58	3.91
Centralization (median & IQR)	2 (IQR $=$ 2.5)	1 (IQR $=$ 1.5)	1	1 (IQR $=$ 2)	1 (IQR $=$ 1)	0

Notes: RTE $=$ Repetitive Trunk Extension; STE $=$ Sustained Trunk Extension; Mean $\pm$ Standard Deviation; ♂$=$ males; ♀$=$ females; FABQ $=$ Fear Avoidance Beliefs Questionnaire; NPRS = Numeric Pain Rating Scale; Centralization: positive numbers represent centralization; IQR $=$ Interquartile Range.