Table 1 Clinical and therapeutic features of the patients .

Pt		Diag		Sex		Disease duration (months)		Infliximab							Etanercept								Adalimumab
								Concomitant DMARD treatment		Treatment duration (months)		Reason for disconuation			Concomitant DMARD treatment		Treatment duration (months)		Currently on treatment		Reason for disconuation		Concomitant DMARD treatment		Treatment duration (months)		Currently on treatment		Reason for disconuation
1		AS		F		48		MTX		12		IRR			MTX		21		Yes		—		—		—		—		—
2		AS		F		300		—		7		IRR			—		31		Yes		—		—		—		—		—
3		AS		F		288		—		20		IRR			—		18		Yes		—		—		—		—		—
4		AS		M		132		—		11		LoE			—		32		Yes		—		—		—		—		—
5		AS		F		144		—		24		LoE			SSZ		11		Yes		—		—		—		—		—
6		AS		M		60		SSZ		12		LaE			SSZ		3		No		LaE		—		—		—		—
7		PsA		F		96		MTX		5		IRR			LFN		33		Yes		—		—		—		—		—
8		PsA		F		192		—		3		IRR			—		36		Yes		—		—		—		—		—
9		PsA		M		60		MTX		12		LoE			—		32		Yes		—		—		—		—		—
10		PsA		M		84		Cs		36		LoE			—		12		Yes		—		—		—		—		—
11		PsA		F		372		MTX		27		LoE			—		24		Yes		—		—		—		—		—
12		PsA		M		72		—		25		LoE			—		18		Yes		—		—		—		—		—
13		PsA		F		72		MTX		10		AE*			—		24		Yes		—		—		—		—		—
14		PsA		F		228		MTX		7		Other†			—		6		Yes		—		—		—		—		—
15		PsA		M		72		MTX		6		IRR			Cs		12		No		LoE		Cs		6		No		LaE
16		PsA		F		336		—		8		LoE			—		3		No		LaE		—		4		No		LaE
17		PsA		F		60		—		—		—			—		3		—		IRR		—		9		Yes		—
18		PsA		F		60		—		—		—			MTX		12		—		LoE		MTX		3		No		LaE
19		PsA		F		60		—		—		—			MTX		6		—		LoE		MTX		16		Yes		—
20		PsA		F		24		—		—		—			MTX		12		—		LoE		MTX		3		Yes		—
21		PsA		F		65		—		—		—			—		3		—		AE‡		—		16		Yes		—
								Etanercept							Infliximab
22		AS		M		36		—		6		LoE			MTX		16		Yes		—		—		—		—		—

Concom, concomitant; Cs, ciclosporin A; Diag, diagnosis; Discon, discontinuation; IRR, infusion/injection related reaction; LaE, lack of efficacy; LFN, leflunomide; LoE, loss of efficacy; MTX, methotrexate; SSZ, salazopyrine.

*Autoimmune hepatitis; †surgery for hip replacement; ‡hypertransaminasaemia.