			Persistent pain (n = 86)			No pain (n = 85)			Model 1					Model 2
			n	%		n	%			Adjusted RR	p-value			Adjusted RR			p-value
Adjustment variables
Whiplash grade											NS						NS
	grade 1		27	31.4		35	41.2	ref							ref
	grade 2		59	68.6		50	58.8	1.3 [0.9 - 1.7]							1.0 [0.8 - 1.4]
Gender												NS							0.003
	Male		27	31.4		37	43.5	ref						ref
	Female		59	68.6		48	56.5	1.3 [1.0 - 1.9]						1.5 [1.1 - 2.1]
Age											NS						NS
	16 - 24 yrs		20	23.3		34	40.0			ref				ref
	25 - 34 yrs		25	29.1		21	24.7			1.4 [0.9 - 2.1]				0.9 [0.6 - 1.3]
	35 - 44 yrs		24	27.9		16	18.8			1.5 [1.0 - 2.3]				0.8 [0.5 - 1.3]
	>=45 yrs		17	19.8		14	16.5			1.4 [0.9 - 2.3]				0.9 [0.6 - 1.4]
Inclusion variables
Responsibility												<0.0.02					0.02
	No		74	86.0		54	63.5			ref				ref
	Yes		12	14.0		31	36.5			0.5 [0.3 - 0.9]				0.6 [0.4 - 1.0]
Pre-accident event: birth												<0.02					NS
		No	60		62.5	73	96.1			ref			ref
		Yes	13		15.1	3	3.5			1.6 [1.2 - 2.2]			1.4 [1.0 - 1.9]
1-year variables
Leisure affected									-								<0.001
		No	45	52.3		81	95.3						ref
		Yes	41	47.7		4	4.7						1.7 [1.3 - 2.3]
Medical drug consumption									-								0.001
		No	43	50.0		82	96.5						ref
		Yes	43	50.0		3	3.5						1.7 [1.3 - 2.4]
Work affected									-								<0.01
		No	35	40.7		58	68.2						ref
		Yes	43	50.0		10	11.8						1.6 [1.2 - 2.1]
Don’t know, no response, not applicable			8	9.3		17	20.0						-