Table 2.

Baseline patient characteristics: dichotomous variables.

Characteristics		CAUa (N=71)			ICBTb + CAU (N=62)			Total group (N=133)			P valuec
		Yes	No	Missing	Yes	No	Missing	Yes	No	Missing
Medical comorbidity		36	32	3	30	30	2	66	62	5	.74
Psychological comorbidity		5	63	3	2	58	2	7	121	5	.32
Employed		28	40	3	28	33	1	56	73	4	.59
Medication use
	Painkillers	8	56	7	10	46	6	18	102	13	.41
	NSAIDSd	29	35	7	23	33	6	52	68	13	.64
	DMARDSe	52	12	7	46	10	6	98	22	13	.90
	Corticoids	13	51	7	12	44	6	25	95	13	.88
	Biologicals	21	43	7	24	32	6	45	75	13	.26
	Mental Health Medication	6	58	7	4	52	6	10	110	13	.66

^aCAU: care as usual.

^bICBT: internet-based cognitive behavioral therapy.

^cOutcome analysis; group differences at baseline were analyzed using chi-square analysis or independent samples t tests as appropriate.

^dNSAID: Nonsteroidal antiinflammatory drugs.

^eDMARD: disease modifying antirheumatic drugs.