Table 1.

Seroprevalence of IgG antibodies to Toxoplasma gondii in psychiatric patients and controls according to age group

	Psychiatric patients			Controls
Age group (years)	No. tested	T. gondii infection		No. tested	T. gondii infection
		No.	%		No.	%	P value
⩽19	44	9	20·45	47	8	17·02	0·675
20–29	128	13	10·16	114	11	9·65	0·895
30–39	113	18	15·93	119	10	8·40	0·079
40–49	80	15	18·75	82	9	10·98	0·164
50–59	40	10	25·00	40	4	10·00	0·078
60–69	9	1	11·11	9	1	11·11	1·00
70–79	14	6	42·86	15	6	40·00	0·876
⩾80	17	5	29·41	19	6	31·58	0·888
Total	445	77	17·30	445	55	12·36	0·038