TABLE 4.

Demographic and Clinical Baseline Characteristics

	Waiting List Group (N = 21)	Early Intervention Group (N = 27)	P
Age (mean, SD)‡	41 (13)	41 (11)	0.954
Sex, women†	8 (38.1%)	15 (55.6%)	0.230
Married/live with significant other†	12 (57%)	21 (78%)	0.310
Educational level§	Completed upper secondary school: 17 (81.0%); Completed higher education: 4 (19%)	Completed upper secondary school: 16 (59.2%); Completed higher education: 11 (40.8%)	0.010
Duration of pain§	No pain: 0 (0%); Less than 3 months: 2 (10%); 3–12 months: 7 (33%); 1–2 years: 4 (19%); >2 years: 8 (38%)	No pain: 1 (4%); Less than 3 months: 9 (33%); 3–12 months: 10 (37%); 1–2 years: 1 (4%); >2 years: 6 (22%)	0.021
Pain (mean, SD)†; (1) In rest; (2) In activity	1) 4.6 (1.8); 2) 5.4 (1.5)	(1) 4.8 (2.1); 2) 5.3 (2.3)	(1) 0.786; (2) 0.864
ODI (mean, SD)†	25.3 (SD: 8.6)	25.6 (12.2)	0.923
FABQ (mean, SD)†; 1) PA; 2)Work	1) 13.5 (3.8); 2) 10.8 (4.7)	(1) 19.4 (9.1); (2) 18.8 (10.6)	(1) 0.036*; (2) 0.846
Comorbidity: No¶	90.5%	92.6%	0.594
Days after randomization to intervention (mean, SD)‡	91 (SD: 4.6)	12 (SD: 4.5)	0.085
Days of sick-leave before baseline‡	160 (SD: 77)	93 (SD: 88)	0.085

^*Significant below 0.05 level.

^†Pearson Chi-square.

^‡Student's T-test.

^§Mann-Whitney U test.

^¶Fisher exact test.