Table 1.

Baseline characteristics for acute and chronic patients

	Acute	Chronic	P-value
	(< 4 weeks)	(> 12 weeks)
	(N = 274)	(N = 255)
Gender (Male)	112 (40.9)	89 (34.9)	0.157
Age (years)	40.0 (±12.58)	41.8 (±13.87)	0.114
In paid employment	235 (86.7)	200 (79.1)	0.020*
Taking pain meds	101 (37.0)	66 (25.9)	0.006*
Radiculopathy present	34 (12.5)	29 (11.4)	0.691
Previous episodes:
None	109 (40.5)	116 (47.5)	0.0001*
1–3	82 (30.5)	25 (10.2)
4 or more	78 (29.0)	103 (42.2)
Trauma onset	32 (11.7)	40 (15.7)	0.179
Smoker	61 (22.8)	56 (22.6)	0.96
In good health	197 (73.0)	138 (54.4)	0.001*
Dizziness present	51 (44.7)	64 (45.1)	0.957

Values are numbers (%). N = number of observations. * = p < 0.05.