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Table 4 Baseline characteristics of responders and non-responders

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

Variable Responders Non-responders p value
Age (mean, SD) 76.32 (4.62) n = 954 77.43 (5.22) n = 63 0.07
Weight (Kilos, mean SD) 65.54 (12.06) n = 912 62.29 (10.93) 0.04
Percent (n) < 58 kilos 30.8% (281/912) 35.5% (22/62) 0.02
Prior any fracture to randomisation 59.4% (567/954) 61.9% (39/63) 0.80
Smoker 4.5% (30/671) 23.9% (11/46) < 0.05
Poor/Fair Health 31.7% (302/953) 46.0% (29/63) 0.03
Maternal hip fracture 14.0% (134/954) 12.7% (8/63) 0.91
Falls in 12 month prior to randomisation 32.3% (308/954) 41.3% (26/63) 0.18
Taking anti-fracture treatment 5.0% (48/954) 3.2% (2/63) 0.72
SF12    
MCS (mean; SD) 52.63 (8.78) n = 929 48.53 (10.6) n = 60 0.01
PCS (mean; SD) 41.29 (11.68) n = 929 37.66 (13.36) n = 60 0.02
Euroqol 0.73 (0.22) n = 938 0.62 (0.30) n = 62 0.01