Comparative analysis of Streptococcus pneumoniaetransmission in Portuguese and Finnish day-care centres

BMC Infectious Diseases

Table 4 Estimates of the model parameters

	Portugal			Finland
	Crude	Adjusted		Crude	Adjusted
	Crude	Mean	(90% CI)	Crude	Mean	(90% CI)
Transmission rate (β)	0.54	1.05	(0.82; 1.31)	0.26	0.63	(0.47; 0.79)
Overall community acquisition rate (n _s к)	0.25	0.25	(0.18; 0.34)	0.11	0.12	(0.09; 0.15)
Clearance rate (μ)	0.33	0.57	(0.51; 0.65)	0.54	0.73	(0.66; 0.81)
Competition (φ)	0.80	0.51	(0.30; 0.77)	1.14	0.67	(0.22; 1.26)

Crude estimates and posterior means and 90% credible intervals (CI) for the four model parameters from the adjusted (full) model. The rate parameters are presented per month. The mean durations of carriage (time until immune clearance) corresponding to the crude exponential clearance rates are 3 months and 1.9 months for the Portuguese and Finnish datasets, respectively. Based on the adjusted analysis and the Weibull clearance rates, the mean durations are 1.6 months in Portugal (90% CI: 1.4-1.8 months) and 1.2 months in Finland (90% CI: 1.1-1.4 months).

ISSN: 1471-2334