Calculate number of cases

Calculate the number of sports-related cases (e.g. injuries) that occurred in a cohort during a period.

Usage

calc_ncases(injd, by = NULL, overall = TRUE)

Arguments

injd

injd S3 object (see prepare_all()).

by

Character specifying the name of the column according to which compute summary statistics. It should refer to a (categorical) variable that describes a grouping factor (e.g. "type of case or injury", "injury location", "sports club"). Optional, defaults to NULL.

overall

Logical, whether to calculate overall (for all the cohort) or athlete-wise summary statistic (i.e. number of cases per cohort of per athlete). Defaults to TRUE.

Value

The number of cases. Either a numeric value (if overall TRUE) or a data frame indicating the number of cases per athlete.

Examples

calc_ncases(injd)
#> ncases 
#>     82 
calc_ncases(injd, overall = FALSE)
#> # A tibble: 28 × 2
#>    person_id               ncases
#>    <fct>                    <dbl>
#>  1 adam-lallana                 6
#>  2 alberto-moreno               1
#>  3 alex-oxlade-chamberlain      1
#>  4 alisson                      0
#>  5 andrew-robertson             5
#>  6 daniel-sturridge             3
#>  7 danny-ings                   0
#>  8 dejan-lovren                 6
#>  9 divock-origi                 1
#> 10 dominic-solanke              0
#> # ℹ 18 more rows
calc_ncases(injd, by = "injury_type")
#> # A tibble: 5 × 2
#>   injury_type ncases
#>   <fct>        <dbl>
#> 1 Bone            11
#> 2 Concussion      16
#> 3 Ligament         9
#> 4 Muscle          25
#> 5 Unknown         21