Table 1

Non-smoking patients with small airways obstruction at follow up

Age	Sex	Disease duration (y)	RF titre	EAF^*	FEV1	FVC	FEV1/FVC	TLCO	FEF_25–75(1988)	FEF_25–75 (1996)^**
55	F	38	1280	No	92	98	93	85	95	63
73	F	23	2560	No	85	90	94	65	76	62
65	F	18	40	vasculitis	82	94	87	79	60	47
63	M	36	640	No	70	90	76	83	39	37
56	M	10	2560	No	71	94	75	80	54	31
51	F	10	640	No	79	88	89	98	58	48

Pulmonary function tests given as % predicted. Small airways obstruction defined as FEF_25–75 <65% predicted. ^*EAF, extra-articular features. ^**p<0.01.