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Table 3 Baseline characteristics of participants who did and did not request the trial's results

From: A randomised controlled trial to assess the effectiveness of offering study results as an incentive to increase response rates to postal questionnaires [ISRCTN26118436]

Baseline Variable Requested trial results Did not request trial results
Age (mean, SD) 76.00 (4.30) n = 647 76.80 (4.68) n = 74
Weight (Kilos, mean SD) 65.59 (11.94) n = 618 64.28 (11.77) (n = 71)
Percent (n) < 58 kilos 30.7% (190/618) 32.4% (23/71)
Prior any fracture 59.2% (383/647) 53.4% (39/73)
Smoker 4.5% (21/463) 3.8% (2/52)
Poor/Fair Health 31.9% (206/646) 41.7% (30/72)
Maternal hip fracture 13.3% (86/647) 16.7% (12/72)
Fall in previous 12 months 31.1% (201/647) 31.9% (23/72)
Taking anti-fracture treatment 5.9% (38/647) 4.2% (3/73)
SF12   
MCS (mean; SD) 52.61 (8.49) n = 629 50.98 (11.5) n = 70
PCS (mean; SD) 41.73 (11.8) n = 629 39.65 (11.20) n = 70
Euroqol 0.74 (0.21) n = 640 0.75 (0.19) n = 71