injurytools (version 2.0.1)

calc_burden: Calculate case burden rate

Description

Calculate the case burden rate of a sports-related health problem (e.g. disease, injury) in a cohort.

Usage

calc_burden(
  injd,
  by = NULL,
  overall = TRUE,
  method = c("poisson", "negbin", "zinfpois", "zinfnb"),
  se = TRUE,
  conf_level = 0.95,
  scale = TRUE,
  quiet = FALSE
)

Value

The case burden rate. Either a numeric value (if overall TRUE) or a data frame indicating the case burden rate per athlete.

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.

method

Method to estimate the incidence (burden) rate. One of "poisson", "negbin", "zinfpois" or "zinfnb"; that stand for Poisson method, negative binomial method, zero-inflated Poisson and zero-inflated negative binomial.

se

Logical, whether to calculate the confidence interval related to the rate.

conf_level

Confidence level (defaults to 0.95).

scale

Logical, whether to transform the incidence and burden rates output according to the unit of exposure (defaults to TRUE).

quiet

Logical, whether or not to silence the warning messages (defaults to FALSE).

References

Bahr R., Clarsen B., & Ekstrand J. (2018). Why we should focus on the burden of injuries and illnesses, not just their incidence. British Journal of Sports Medicine, 52(16), 1018–1021. tools:::Rd_expr_doi("10.1136/bjsports-2017-098160")

Waldén M., Mountjoy M., McCall A., Serner A., Massey A., Tol J. L., ... & Andersen T. E. (2023). Football-specific extension of the IOC consensus statement: methods for recording and reporting of epidemiological data on injury and illness in sport 2020. British journal of sports medicine.

Examples

calc_burden(injd)
calc_burden(injd, overall = FALSE)
calc_burden(injd, by = "injury_type")