Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 2 Inclusion frequencies and average rank per indicator selected by the four methods (MI = multiple imputations, B = bootstrap, M100+B = 100 imputations+bootstap, MI10+B = 10 imputations+bootstrap)

From: Variable selection under multiple imputation using the bootstrap in a prognostic study

  Method
  MI† B† MI100+B† MI10+B† MI10 + B‡
  % rank % rank % rank % rank % rank
Level of functional status at 3 months 100.0 1 100.0 1 99.4 1 99.5 1 88.0 3
Change in pain intensity 100.0 2 100.0 2 99.3 2 98.5 2 99.1 1
Pain at baseline 100.0 3 90.2 6 96.2 3 95.7 3 97.7 2
Physical activity 95.0 4 99.4 3 85.7 4 91.2 4 61.3 5
Vibration tools 90.0 5 94.2 4 81.0 5 80.9 5 43.7 13
Whole body vibration 88.0 6 71.0 12 77.2 7 79.6 6 50.2 4
Sitting 86.0 7 75.6 10 76.5 9 75.7 9 50.2 9
Job demands 81.0 8 65.6 16 77.7 6 79.0 7 52.2 8
Passive pain coping 77.0 9 51.8 30 71.8 11 72.5 11 41.1 15
Duration of complaints 70.0 10 71.2 11 76.5 8 77.4 8 35.9 19
Body mass index 63.0 11 90.8 5 66.1 13 69.0 14 39.2 16
Treatment during enrollment 62.0 12 85.8 7 75.5 10 75.5 10 46.2 11
Pain radiation 61.0 13 85.8 8 68.2 12 69.4 12 31.6 21
Working with hands under knee level 59.0 14 76.8 9 65.9 15 68.1 15 31.2 22
Education level 57.0 15 66.0 15 65.7 14 65.1 16 32.1 20
Job control 53.0 16 64.2 17 65.4 16 69.1 13 36.9 18
Quality of life 51.0 17 51.8 31 62.5 21 60.8 23 24.9 26
Bending and twisting of the trunk 50.0 18 56.8 22 64.6 17 62.9 17 45.9 12
Age 48.0 19 68.4 13 62.2 22 57.5 29 23.0 29
Lifting 48.0 20 66.6 14 61.4 24 60.4 25 41.8 14
Fear avoidance beliefs 48.0 21 55.8 26 63.3 19 61.8 21 25.4 25
Change in functional status 44.0 22 52.0 29 63.4 18 59.9 26 55.9 6
Kinesiophobia 43.0 23 52.8 28 63.2 20 60.4 24 22.6 30
Gender 42.0 24 56.2 24 61.5 23 61.5 20 24.6 27
Social support 41.0 25 56.0 25 60.0 26 62.8 18 27.9 24
Self-predicted certainty at 6 months 35.0 26 61.6 18 60.9 25 62.5 19 28.1 23
Active pain coping 32.0 27 54.4 27 59.9 27 58.6 28 23.5 28
Functional status at baseline 31.0 28 58.0 21 59.1 28 57.0 30 46.8 10
Stooping 30.0 29 58.8 19 57.7 30 59.4 27 53.0 7
Job satisfaction 29.0 30 58.4 20 58.2 29 60.9 22 37.7 17
Work absence at baseline 27.0 31 56.8 23 57.1 31 55.1 31 19.2 31
  1. Rank: the sequence of indicators in order of their appearance into the backward regression models.
  2. %: the proportion of times that the indicator is retained in the backward regression models (inclusion frequency).
  3. † P-value used of 0.5.
  4. ‡ P-value used of 0.157.