An injd object (S3), called injd, to showcase what
this object is like and also to save computation time in some help files
provided by the package. The result of applying prepare_all() to
raw_df_exposures (prepare_exp(raw_df_exposures, ...)) and
raw_df_injuries (prepare_inj(raw_df_injuries, ...)).
Format
The main data frame in injd gathers information of 28 players
and has 108 rows and 19 columns:
- person_id
Player identifier (factor)
- t0
Follow-up period of the corresponding player, i.e. player’s first observed date, same value for each player (Date)
- tf
Follow-up period of the corresponding player, i.e. player’s last observed date, same value for each player (Date)
- date_injured
Date of injury of the corresponding observation (if any). Otherwise NA (Date)
- date_recovered
Date of recovery of the corresponding observation (if any). Otherwise NA (Date)
- tstart
Beginning date of the corresponding interval in which the observation has been at risk of injury (Date)
- tstop
Ending date of the corresponding interval in which the observation has been at risk of injury (Date)
- tstart_minPlay
Beginning time. Minutes played in matches until the start of this interval in which the observation has been at risk of injury (numeric)
- tstop_minPlay
Ending time. Minutes played in matches until the finish of this interval in which the observation has been at risk of injury (numeric)
- status
injury (event) indicator (numeric)
- enum
an integer indicating the recurrence number, i.e. the \(k\)-th injury (event), at which the observation is at risk
- days_lost
Number of days lost due to injury (numeric)
- player_id
Identification number of the football player (factor)
- season
Season to which this player's entry corresponds (factor)
- games_lost
Number of matches lost due to injury (numeric)
- injury
Injury specification as it appears in https://www.transfermarkt.com, if any; otherwise NA (character)
- injury_acl
Whether it is Anterior Cruciate Ligament (ACL) injury or not (NO_ACL); if the interval corresponds to an injury, NA otherwise (factor)
- injury_type
A five level categorical variable indicating the type of injury, whether Bone, Concussion, Ligament, Muscle or Unknown; if any, NA otherwise (factor)
- injury_severity
A four level categorical variable indicating the severity of the injury (if any), whether Minor (<7 days lost), Moderate ([7, 28) days lost), Severe ([28, 84) days lost) or Very_severe (>=84 days lost); NA otherwise (factor)