Table 1

Variables and categories used in the football incident analysis

κ
Variables and categoriesInterIntra
Results from interobserver and intraobserver analysis are shown in the right hand columns.
Ball possession0.851.00
    Attack: a team is in possession, i.e. with ball control and necessary space and time for decision possibilities with the ball
    Defence: the opposing team is in possession, i.e. with ball control and necessary space and time for decision possibilities with the ball
Attack type0.670.88
    Set plays: attacks that start by a set play and finish while players are still in original grouping (free kick, throw in, corner kick, goal kick, penalty kick, kick off, and drop)
    Breakdowns: attacks that start by winning the ball in play and maintaining and/or increasing imbalance in opponent defence throughout the attack
    Long attacks: attacks that start by winning the ball in play or a set play and progress without taking advantage of opponent’s imbalance
    Long attacks, including long pass: long attacks with at least one pass that covers a minimum of one third of the playing field, i.e. about 35 m or more (includes goal kicks and clearance)
Positioning, i.e. a player’s position in relation to the immediate opponent0.800.83
    One on one situation: one against one (face to face, back to face, different sideways positions)
    Not one on one situation: without involving an opponent player or when one against two or more players
Team action before injury risk incident, i.e. type of passing actions by the attacking team before injury risk incident0.740.93
    Long pass: long pass forwards (35 m or more), long pass from goalkeeper, long clearance, long pass across the field
    Short pass: short pass forwards, short pass backwards, wall pass, short pass from goalkeeper
    Flick: flick using either foot or head
    Cross: a pass from side corridor into the score box
    Deflection: unintentional pass from fellow or opponent player
Localisation on the field, i.e. zones on the playing field (fig 1)0.840.84
    Defensive third: the defending third of the playing field
    Midfield zone 1: the first half of the middle third of the playing field
    Midfield zone 2: the second half of the middle third of the playing field
    Attacking third: the attacking third of the playing field
    Score box: prolongation of the penalty area to half line between 16 m line and the nearest midfield zone
Attack effectiveness0.881.00
    Effective attack: attack that ends up with shooting attempt and shot off target, shot on target, or goal
    Non-effective attack: attack that ends up with none of the above
Ball winning situations0.840.94
    At the moment of ball winning: attempting to regain possession (1st defender)
    After ball winning (up to 5 s): immediately after regaining possession (1st attacker)
    After 2nd ball: regaining ball after deflection from opponent player (1st attacker)
    Not ball winning situations: attempting to maintain possession (1st attacker) and incidents away from the ball
Degree of balance in opponents’ defence0.630.88
    Good balance: Both numerical (i.e. equal or greater number of opponents on the right side of the ball) and positional balance (i.e. pressing, covering and marking defending tasks) are achieved
    Average balance: either numerical or positional balance is achieved
    Poor balance: neither numerical nor positional balance are achieved
Player role0.770.97
    1st defender: pressing defending player on the right side of the ball
    Other defender: all the remaining players of the defending team
    1st attacker: player with the ball on the attacking team
    Other attacker: all the remaining players of the attacking team
Player position, i.e. static positions of players on the field based on playing formations1.001.00
    (Goalkeeper, fullback, central defender, wing midfielder, inside midfielder, central midfielder, striker)
Type of individual action with the ball0.800.89
    Dribbling (including moving with the ball), heading, receiving the ball, screening tackling, turning, flicking (using foot or head), passing, goalkeeper action, shooting, blocking, clearing, ball to body accident, unclear action and no action with the ball
Degree of individual ball control0.830.87
    High level of control: in control of the ball after receiving it
    Low level of control: not in control of the ball
Player’s movement direction i.e. movement direction in relation to the opponent’s goal (forward, sideward, backward, no movement)0.780.90
Player’s movement intensity0.810.82
    High intensity: including sprinting and moderate intensity running
    Low intensity: including jogging, walking and standing
Duel type0.850.88
    In duel:
        - Heading duel-active (heading actively) and heading duel-passive (unaware of heading duel or attention towards other action with the ball)
        - Tackling duel-active (tackling actively) and tackling duel-passive (unaware of tackling duel or attention towards other action with the ball)
        - Screening duel-active (screening actively) and screening duel-passive (unaware of screening duel or attention towards other action with the ball)
        - Running duel and other (pushing, kicking, obstruction, stepping, collision)
    Not in duel: without involving opponent player(s)
Attention0.960.96
    Attention towards primary duellist: player concentrates on immediate opponent
    Attention towards the ball: player concentrates on the ball;
        - On the ground (ball in contact with the playing surface)
        - In the air (ball at head height and upwards)
        - Ball between head height and playing surface
    Attention towards team mate
        - Near (in the vicinity of the ball)
        - Further away (not in the vicinity of the ball)
Tackling type0.790.88
    Being tackled: involving a player that is being tackled by the opponent (from front, from side, from back)
    Not being tackled: involving attacking player that is not being tackled
    Tackling: involving a player that is tackling the opponent (from front, from side, from back)
    Not tackling: involving defending player that is not tackling
Type of incident risk action0.800.94
    Against 1st attacker towards “back room”: attempt to stop a player with the ball from penetrating a space behind the last defender (tackling, obstruction, holding)
    Against 1st attacker elsewhere
    Against 1st defender
    Action away from the ball
    Actions against other players (2nd and 3rd attackers and defenders)
Referee’s decision0.780.78
    Free kick for
    Free kick against
    Yellow card
    Red card
    No foul called