Table 2.

Median serum IgG subclass and total IgE concentration in control and gold-treated rheumatoid arthritis (RA) patients, range in parentheses

Patient group	Number	IgG1, g/l	IgG2, g/l	IgG3, g/l	IgG4, g/l	IgE, g/l
Controls	82	8·5	3·2	0·7	0·4	21
		(3·38–21·5)	(0·48–8·1)	(0·15–1·7)	(0·06–5·16)	(1–934)
Gold	85	7·2	2·5	0·6	0·3	15
		(1·47–29·3)	(0·48–10·9)	(0·07–2·27)	(0·02–3·15)	(1–1963)
P*		0·004	0·008	0·019	0·044	0·3

^*Multiple regression analysis: gold-treated compared with control group taking into account disease duration, rheumatoid factor and erosive status.