Table 6

The incidence (per 1000 runners starting the race: 95% CI) of serious Exercise Associated Muscle Cramping (sEAMC during a 21 km race by year of observation (environmental conditions), gender, running experience group and running pace group

Variable	Category	Incidence	95% CI
Year of observation	2008	0.10	0.02 to 0.73
	2009	0.19	0.05 to 0.75
	2010	0.63	0.28 to 1.40
	2011	0.11	0.02 to 0.75
Gender	Female	0.33	0.15 to 0.73
	Male	0.19	0.07 to 0.51
Age groups (years)*
Running experience (medals)	≤1	0.30	0.13 to 0.66
	2+	0.21	0.08 to 0.56
Running pace (min/km)	<6	0.23	0.08 to 0.72
	6–7	0.38	0.16 to 0.92
	>7	0.15	0.04 to 0.62

Age model not analysed because of small numbers.
*Too few sEAMC's reported per age category to analyse.