Table 2.

Multivariate analysis of variables concerning patient history

Variables	OR	95% CI	P-value
Diarrhoea	1.60	0.82 to 3.09	0.17
Moaning	1.50	0.80 to 2.81	0.21
Earache	1.49	0.73 to 3.06	0.28
Sore throat	2.51	1.17 to 5.37	0.02

OR = odds ratio. Bold = P<0.157. The patient history forms included categorical variables with possible answers: ‘no, little, very, very much, and do not know’. These variables were dichotomised using a cut-off point between ‘little’ (including ‘do not know’) and ‘very’.