Development of a prognostic model based on demographic, environmental and lifestyle information for predicting incidences of symptomatic respiratory or gastrointestinal infection in adult office workers

Table 3 Variables significantly predicting relatively frequent reported exposure to or reported own symptoms of respiratory (RTI) or gastrointestinal tract infection (GTI)

Variable^a	Incidence rate ratio, confidence interval (CI) and p value
Variable^a	Reported exposure		Reported own symptoms
	RTI	GTI	RTI	GTI
Increasing age	Component I 1.064 CI 1.013,1.118 p = 0.014 Component II 0.999 CI 0.998, 1.000 p = 0.001	0.984 CI 0.975, 0.992 p < 0.001	0.975 CI 0.968, 0.981 p < 0.001	0.983 CI 0.972, 0.994 p = 0.003
Male gender	0.701 CI 0.597, 0.823 p < 0.001	0.614 CI 0.494, 0.763 p < 0.001		0.695 CI 0.530, 0.911 p = 0.009
Child in day care			1.176 CI 0.966, 1.432 p = 0.107
Use of public transport			1.204 CI 1.043, 1.389 p = 0.011
Chronic disease			1.215 CI 0.990, 1.491 p = 0.062	1.284 CI 0.915, 1.804 p = 0.15
Recipient of influenza vaccination			1.328 CI 1.112, 1.586 p = 0.002
Living with at-job-exposed adult	1.111 CI 0.853, 1.446 p = 0.43	1.752 CI 1.240, 2.475 p = 0.001
Passive smoking	1.173 CI 1.033, 1.332 p = 0.014	1.261 CI 1.065, 1.494 p = 0.01

^aEmpty spaces indicate that the variable was not significant in predicting the corresponding endpoint. The following variables did not contribute significantly to any endpoint: living with young children of any age, or with a child in the school age; frequency of business travel; active smoking

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