Table 2.

Uncertain model parameters and their properties

	Distribution	Mean	95% CI	Reference
Fraction of participating GPs	beta	0.375	0.056–0.789	[11]
Fraction filling in SQUASH	beta	0.83	0.54–0.99	[12]
Costs for scoring SQUASH	2.22 * (1+ 4*beta)	6.66	3.37–9.95	Expert opinion. Minimum one minute (digital scoring) to maximum five minutes (manual scoring, multiple sports)
Fraction accepting pedometer, and fraction completing follow-up sessions	beta	0.50	0.13–0.87
Additional steps per day	normal	2491	1098–3885	[4]
Fraction of the effect sustained in the long term	beta	0.25	0.08–0.47	[18]
Incidence, prevalence, and mortality rates of each disease	Poisson and binomial			[20]