Baseline characteristics of all participants in a trial evaluating hip protectors, those lost to follow-up, and those remaining in the trial to the end.6 Values are percentages (numbers) unless stated otherwise

All participantsParticipants lost to follow-upRemaining participants
Baseline variableHip protector (n=1388)Control (n=2781)Hip protector (n=372)Control (n=619)Hip protector (n=1016)Control (n=2162)
Mean (SD) age (years)77.9 (5.73)77.8 (5.48)78.8 (6.29)78.4 (5.46)77.5 (5.5)77.6 (5.5)
Mean (SD) weight (kg)60.8 (11.5)61.2 (11.4)60.5 (12.1)61.3 (11.5)60.8 (11.3)61.2 (11.3)
Weight <58 kg46.5 (645)44.2 (1230)47.6 (177)44.6 (276)46.1 (468)44.1 (954)
Previous fracture67.7 (940)67.7 (1882)64.2 (239)67.2 (416)69.0 (701)67.8 (1466)
Smoker12.0 (167)12.6 (350)15.9 (59)16.5 (102)10.6 (108)11.5 (248)
Poor or fair health38.0 (528)38.7 (1075)43.5 (162)48.5 (300)36.0 (366)35.8 (775)
Fall in past 12 months43.2 (599)43.0 (1196)47.0 (175)48.3 (299)41.7 (424)41.5 (897)
Volunteers*14.3 (199)14.1 (393)10.5 (39)16.6 (103)15.7 (160)13.4 (290)
  • * Volunteers are participants who contacted the study coordinators independently in response to media advertising.