Table 4. Co-morbidity of autoimmune diseases: number of observed and expected people with zero, one and more than one autoimmune disease.

	Number ofAutoimmuneDiseases	NumberObserved	NumberExpected	p value
TOTAL SAMPLE	0	24,585	24,553	<0.001
(N = 25885)	1	1,243	1,308
	>1	57	24
WOMEN	0	13,186	13,161	<0.001
(N = 14167)	1	934	983
	>1	47	22
MEN	0	11,399	11,392	0.001
(N = 11718)	1	309	322
	>1	10	3