Table 1. Descriptive statistics of the sample. The first two columns represent the full sample (N  =  149) whereas the second two columns (N  =  107) represent subjects with a baseline Oswestry disability index (ODI) of <20.

Variable	(N  =  149)		(N  =  107)		P value
	Full sample		Partial sample of ODI <20
	Mean (SD)/frequency	Ranges/percentages	Mean (SD)/frequency	Ranges/percentages
Age (years)	482 (149)	18–88 years	497 (151)	18–88 years	043
Gender	70 = male	47%  =  male	46  =  male	43%  =  male	061
	79 = female	53%  =  female	61  =  female	57%  =  female
Irritability	39 = irritable	262%  =  irritable	34  =  irritable	318%  =  irritable	042
	109 = not irritable	732%  =  not irritable	73  =  not irritable	682%  =  not irritable
	1 = missing	07%  =  missing	0  =  missing	0%  =  missing
Race/culture	136 = white	913%  =  white	96  =  white	897%  =  white	099
	3  =  black	2%  =  black	2  =  black	19%  =  black
	3  =  hispanic	2%  =  hispanic	3  =  hispanic	28%  =  hispanic
	3  =  asian	2%  =  asian	3  =  asian	28%  =  asian
	2  =  other	13%  =  other	2  =  other	19%  =  other
	2  =  missing	13%  =  missing	1  =  missing	09%  =  missing
BMI	264 (48)	187–467	266 (50)	187–467	075
Baseline LBP classification	75  =  acute	503%  =  acute	54  =  acute	505%  =  acute	098
	43  =  sub-acute	289%  =  sub-acute	30  =  sub-acute	280%  =  sub-acute
	31  =  chronic	208%  =  chronic	23  =  chronic	215%  =  chronic
	0  =  missing	0%  =  missing	0  =  missing	0%  =  missing
Symptom duration (weeks)	339 (989)	1–1000 weeks	264 (502)	1–312 weeks	047
Diagnosis	70  =  sprains and strains	469%  =  sprains and strains	52  =  sprains and strains	486%  =  sprains and strains	089
	72  =  lumbago and degenerative conditions	484%  =  lumbago and degenerative conditions	50  =  lumbago and degenerative conditions	467%  =  lumbago and degenerative conditions
	7  =  missing	47%  =  missing	5  =  missing	47%  =  missing
Total visits	69 (46)	3–28 visits	76 (45)	2–28 visits	023
Total days in care	357 (299)	3–150 days	366 (305)	1–160 days	081
NPRS at baseline	52/10 (21)	1/10–10/10	55/10 (19)	1/10–10/10	024
ODI at baseline	306 (157)	2–78	377 (125)	22–78	<001
FABQ-w at baseline	119 (107)	0–43	1306 (110)	0–43	039
Met CPR	71  =  met rule	49%  =  met rule	46  =  met rule	43%  =  met rule	054
	78  =  did not meet rule	51%  =  did not meet rule	61  =  did not meet rule	57%  =  did not meet rule
Treatment group	73  =  non-thrust manipulation	49%  =  non-thrust manipulation	52  =  non-thrust manipulation	486%  =  non-thrust manipulation	095
	76  =  thrust manipulation	51%  =  thrust manipulation	55  =  thrust manipulation	514%  =  thrust manipulation