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Table 2 Characteristics of cases with complete candidate prognostic factor data, and cases with at least one missing observation for any candidate prognostic factor in the PHE dataset with < 15% missing values

From: A study protocol for the development and internal validation of a multivariable prognostic model to determine lower extremity muscle injury risk in elite football (soccer) players, with further exploration of prognostic factors

 

Complete cases (n=264 person-seasons)

Incomplete cases (n=53 person-seasons)

Sample characteristic

Number of obs

Mean (SD)

Number of obs

Mean (SD)

Age (years)

264

20.83 (4.42)

53

23.55 (4.48)

Height (cm)

264

180.58 (6.34)

35

181.12 (6.68)

Weight (kg)

264

74.15 (7.55)

35

77.86 (7.98)

BMI (kg/m2 )

264

22.72 (1.76)

30

23.75 (2.24)

  1. PF prognostic factor, obs observations, SD standard deviation, cm centimetres, kg kilograms, kg/m2 kilograms divided by body height (metres) squared