Table 2.
Descriptive statistics of participants and nonparticipants
| Characteristics | Participants (N = 413) | Nonparticipants (N = 66) | p |
|---|---|---|---|
| Mean age ±SD (y) | 62.3 ±14.9 | 64.3 ±11.9 | 0.320 |
| Sex (%) | 413 valid cases | 65 valid cases | |
| Men | 290 (70%) | 44 (68%) | 0.680* |
| Women | 123 (30%) | 21 (32%) | |
| Amputation level (%) | 409 valid cases | 57 valid cases | |
| Ankle disarticulation | 5 (1%) | 0 (0%) | 0.235** |
| Trans-tibial amputation | 234 (57%) | 26 (46%) | |
| Knee disarticulation | 44 (11%) | 7 (12%) | |
| Trans-femoral amputation | 116 (28%) | 24 (42%) | |
| Hip disarticulation | 6 (2%) | 0 (0%) | |
| Rotationplasty | 4 (1%) | 0 (0%) | |
| BMI (kg/m2) | 386 valid cases | ||
| Mean BMI ±SD (95% CI) | 27.5 ±5.0 (27.0−28.0) | ||
| BMI category (%) | 386 valid cases | ||
| Underweight (<18.5 kg/m2) | 7 (2%) | ||
| Normal weight (18.5-24.9 kg/m2) | 119 (31%) | ||
| Overweight (25.0-29.9 kg/m2) | 152 (39%) | ||
| Obesity (≥30 kg/m2) | 108 (28%) | ||
| Body weight (%) | 380 valid cases | ||
| <100 kg | 330 (87%) | ||
| ≥100 kg | 50 (13%) | ||
| Median time since amputation (y, IQR) | 400 valid cases | ||
| 12.4 (3.2;30.7) | |||
| Reason for amputation (%) | 409 valid cases | ||
| Trauma | 159 (39%) | ||
| Diabetes and/or PAD | 114 (28%) | ||
| Other | 47 (12%) | ||
| Malignancy | 40 (10%) | ||
| Infection | 38 (9%) | ||
| Congenital | 11 (3%) | ||
| Comorbidity (%) | 405 valid cases | ||
| None | 207 (51%) | ||
| Duration use of prosthesis (%) | 405 valid cases | ||
| 0-12 hours/day | 142 (35%) | ||
| ≥12 hours/day | 263 (65%) | ||
| Walking distance outdoors (%) | 404 valid cases | ||
| <500 meters/day | 219 (54%) | ||
| ≥500 meters/day | 185 (46%) | ||
| Time walking with prosthesis indoors (%) | 407 valid cases | ||
| <50% | 105 (26%) | ||
| ≥50% | 302 (74%) | ||
| Use of walking aid (%) | 407 valid cases | ||
| Yes | 224 (55%) | ||
| Any skin problem in month prior to completing questionnaire (%) | 413 valid cases | ||
| Yes | 319 (77%) | ||
| Severe skin problem in month prior to completing questionnaire (%)a | 397 valid cases | ||
| Yes | 125 (32%) | ||
| Skin problems in period >1 month prior to completing questionnaire (%) | 400 valid cases | ||
| Yes | 250 (63%) |
aSkin problem with a negative impact on use of the prosthesis and/or a high or very high degree of discomfort due to an itching skin, sensitive skin, prickly skin and/or painful skin (using a 4-point scale: none, limited, high, very high)
*Pearson Chi-Square = 0.170
**Pearson Chi-Square = 6.548, exact procedure