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Table 1 Item groups, categories, and factors of the observation form for basketball

From: Collision with opponents—but not foul play—dominates injury mechanism in professional men’s basketball

Item group Category Factor
I General Identification code of injury, club, date of match, type of competition (league match, cup match), number of match (e.g. league match), type of match (home, away), match minute of injury, playing position of injured player (point guard (PG), shooting guard (SG), small forward (SF), power forward (PF), center (C))
II Court area 7 frontcourt and 7 backcourt zones
III Ball possession Injured player, own team, direct opponent, opponent team, none
  Game action General: standing, starting, running, sprinting, side-step, stopping, change-of-direction, taking-off, being mid-air, landing
   Basketball-specific: passing, lay-up/dunking, catching, penetration, shooting, blocking, screening/picking, closing out, boxing out, rebounding, other 1-on-1 situation, faking, fighting for the ball, screen defense, posting up, help defense, other
  Game phase Set offense, fast break, transition defense, halfcourt defense, securing the ball, other
  Floor contact Both legs, single leg, no contact
  Interaction with other players No other player, teammate, opponent, both
  Foul play subjective* No foul, foul play by opponent, foul play by teammate
  Referee decision No foul, foul play by opponent, foul play by injured player
   No penalization, defensive foul, unsportsmanlike foul, disqualifying foul
VI Main mechanism Contact, indirect contact, non-contact
  Detailed mechanism (a) Collision with opponent, collision with teammate, collision with ball, other collision, hit/push of opponent, pull/hold of opponent, other interaction with opponent
   (b) Fall, ankle twist, knee twist, slip, overload, other
V Injured body site Head, neck, shoulder, upper arm, elbow, lower arm, wrist/hand, finger, trunk, hip, thigh, knee, lower leg, ankle/foot, unidentified
  Initial contact with player's body site* Head, neck, shoulder, upper arm, elbow, lower arm, wrist/hand, finger, trunk, hip, thigh, knee, lower leg, ankle/foot, unidentified
  Initial contact with body site of opponent* Head, neck, shoulder, upper arm, elbow, lower arm, wrist/hand, finger, trunk, hip, thigh, knee, lower leg, ankle/foot, unidentified
  1. *Optional