Table 1

Percentage of patients with the various baseline demographic factors

Baseline variable
Previous Pregnancy number	None = 51.3%	1 = 35.4%	2 = 12.4%	3 = 0.9%
	(N = 59)	(N = 41)	(N = 14)	(N = 1)
Chronicity LBP	0-4 Weeks = 58.3%	4-12 Weeks = 30.4%	More than 12 Weeks = 11.3%
	(N = 67)	(N = 35)	(N = 13)
History of LBP	No = 46%	Yes = 54%
	(N = 53)	(N = 62)
Number of Prior LBP episodes	None = 36.5%	1 – 3 = 27.0%	4 or more = 36.5%
	(N = 42)	(N = 31)	(N = 42)
LBP during previous pregnancy	No previous pregnancy = 53.0%	Yes = 27.0%	No = 20.0%
	(N = 61)	N = 31)	(N = 23)
Location of LBP	LBP only = 32.2%	Pelvic pain only = 31.3%	Combination = 35.7%
	(N = 37)	(N = 36)	(N = 41)
Work Status	Working = 71.3%	Off due to LBP = 10.4%	Not working = 18.3%
	(N = 82)	(N = 12)	(N = 21)
Smoker	No = 96.5%	Yes = 3.5%
	(N = 111)	(N = 4)
Exercise	Regular = 58.5%	Occasional = 18.4%	None = 22.8%
	(N = 68)	(N = 21)	(N = 26)
Gestational Week Category	1st Trimester = 5.3%	2nd Trimester = 41.6%	3rd Trimester = 53.1%
	N = 6)	(N = 48)	(N = 61)

LBP low back pain
N number or patients.