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Table 1 Patient characteristic of study population (N = 5292)

From: Simple imputation methods were inadequate for missing not at random (MNAR) quality of life data

    Percentage with score available at 4 m Percentage without score available at 4 m
   All Patients Number (%) No reminder After reminder Not returned Absent or withdrawn Dead
Age group 70–74 1917 (36) 40 37 29 29 12
  75–79 1665 (32) 33 31 31 30 18
  80–84 1030 (19) 17 19 23 24 33
  85+ 680 (13) 10 13 17 17 36
Sex Male 811 (15) 16 13 15 13 31
  Female 4480 (85) 84 87 84 87 69
Type of recruiting fracture Proximal femur 904 (17) 16 17 20 18 47
  Other leg and pelvic 1130 (21) 22 20 21 20 17
  Distal arm 1846 (35) 36 35 31 36 20
  Other arm 1403 (27) 26 28 28 25 17
  Other 9 (<1) 0 0 0 0 0
Locomotor ability (Walk unaccompanied) Yes 4979 (94) 95 93 93 93 85
  No 300 (6) 5 7 7 7 15
Time since recruiting fracture ≤ 90 days 4331 (82) 81 84 82 86 73
  > 90 days 961 (18) 19 16 18 14 27
Residence type prior to recruiting fracture Own home 4628 (88) 89 86 84 87 78
  Sheltered housing 538 (10) 9 12 13 11 11
  Other 126 (2) 2 2 3 2 11
Residence type after recruiting fracture Own home 4555 (86) 88 85 82 85 74
  Sheltered housing 531 (10) 9 11 12 10 11
  Other 206 (4) 3 4 6 5 15
Marital status Single 348 (7) 7 6 7 6 7
  Married 2069 (40) 42 36 32 39 25
  Divorced 222 (4) 4 5 5 2 2
  Widow(er) 2634 (50) 47 52 56 52 65