Table 3.

Stratified analysis of attack rate by diet type by whether thickened fluid consumed

	Thickened fluid				No thickened fluid
	Case	Non-case	Total	Attack rate	Case	Non-case	Total	Attack rate
Full diet	2	4	6	33%	2	24	26	8%
Soft diet	8	5	13	62%	0	5	5	0%
Puréed diet	10	5	15	66%	0	0	0	0%
Enteral diet	0	1	1	0%	0	4	4	0%