Table 3.

Relation between background variables and positive and negative health (%).

	Positive health (n = 84)	Negative health (n = 107)	P-valuea)
Age
≤ 54 years	14	46
≥ 55 years	86	54	0.000
Gender
Males	36	26
Females	64	74	0.154
DP-year
1986–87	35	35
1988–89	38	38
1990	27	28	0.991
Education
Elementary	87	88
Additional	13	12	0.845
Immigrant
Yes	6	33
No	94	67	0.000
Fibromyalgiab) as DP diagnosis
Yes	19	37
No	81	63	0.006
Back painc) as DP diagnosis
Yes	48	38
No	52	62	0.197

a) P-value when testing the hypothesis that there was no difference between groups with positive and negative health; figures in bold when significant (p < 0.05); b) Fibromyalgia and other general pain disorders (non-inflammatory conditions), for definition see Material and Methods; c) For definition see Material and Methods.