The beta coefficient for passing plays was actually 0.0171 and so I believe the estimate already exponentiated this for me: e ^ 0.171 = 1.2. My interpretation of this is as follows: For every 10 additional pass plays, there are 20% greater expected injuries per team-game. Given the overall mean rate of injuries of 0.60 injuries/team-game, this corresponds to approximately 2 additional expected injuries per team each 16-game season (.60 x .2 x 16 = about 2). Would this interpretation be correct?   Also would this be expressing an incidence rate ratio or a different effect?   ... View more