The incidence (per 1000 runners starting the race: 95% CI) of musculoskeletal complications during a 21 km race by year of observation (environmental conditions), gender, age group, running experience group and running pace group
| Variable | Category | Incidence | 95% CI |
|---|---|---|---|
| Year of observation | 2008 | 1.03 | 0.56 to 1.92 |
| 2009 | 0.75 | 0.38 to 1.50 | |
| 2010 | 0.63 | 0.28 to 1.41 | |
| 2011 | 1.48 | 0.87 to 2.49 | |
| Gender | Female | 1.03 | 0.66 to 1.62 |
| Male | 0.91 | 0.58 to 1.42 | |
| Age groups (years) | 16–30 | 0.98 | 0.59 to 1.62 |
| 31–40 | 0.92 | 0.49 to 1.71 | |
| 41–50 | 1.05 | 0.52 to 2.09 | |
| >50 | 0.93 | 0.39 to 2.23 | |
| Running experience (medals) | ≤1 | 1.29 | 0.88 to 1.90 |
| 2+ | 0.63 | 0.36 to 1.10 | |
| Running pace (min/km) | <6 | 0.62 | 0.31 to 1.23 |
| 6–7 | 0.38 | 0.16 to 0.92 | |
| >7 | 1.39 | 0.88 to 2.20 |