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. Author manuscript; available in PMC: 2017 May 24.
Published in final edited form as: Circulation. 2016 Apr 27;133(21):1995–2007. doi: 10.1161/CIRCULATIONAHA.115.020259

Table 2.

Reasons for Missing Data in the PROMISE Trial Quality of Life Substudy.

5985 Randomized
Anatomic
(N=2982)		 Functional
(N=3003)
Baseline 2960 (99.3%) questionnaire data
 0 (0%) dead
 22 (0.7%) missing

  • 15 refused

  • 5 withdrawn

  • 2 unable to locate

 2963 (98.7%) questionnaire data
 0 (0%) dead
 40 (1.3%) missing

  • 27 refused

  • 10 withdrawn

  • 3 unable to locate
Interim losses* 3 died, 36 withdrawn 6 died, 60 withdrawn
6 Month 2772/2943 (94.2%) questionnaire
data
 1 (0.03%) dead
 170 (5.7%) missing

  • 132 unable to locate

  • 6 refused

  • 1 too ill or deaf

  • 31 withdrew

 2700/2937 (91.9%) questionnaire data

 6 (0.2%) dead
 231 (7.9%) missing

  • 154 unable to locate

  • 7 refused

  • 1 too ill or deaf

  • 69 withdrew
Interim losses 4 died, 50 withdrawn 9 died, 96 withdrawn
12 Month 2715/2889 (93.9%) questionnaire
data
 4 (0.1%) dead
 170 (5.9%) missing

  • 122 unable to locate

  • 11 refused

  • 37 withdrew

 2575/2832 (90.9%) questionnaire data

 1 (0.04%) dead
 256 (9.0%) missing

  • 178 unable to locate

  • 7 refused

  • 71 withdrew
Interim losses 16 died, 73 withdrew 10 died, 153 withdrew
24 Month 2479/2800 (88.5%) questionnaire
data
 7 (0.25%) dead
 314 (11.2%) missing

  • 256 unable to locate

  • 7 refused

  • 2 too ill or deaf

  • 29 withdrew

 2284/2669 (85.6%) questionnaire data

 4 (0.15%) dead
 381 (14.3%) missing

  • 291 unable to locate

  • 38 refused

  • 52 withdrew
*

Interim losses include deaths and number of withdrawn from previous assessment window.