| Failure Mechanism | Manual | Power | Stroller | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| count | % of frame failures | % of all tests | count | % of frame failures | % of all tests | count | % of frame failures | % of all tests | count | % of frame failures | % of all tests | ||
| Seating-dependent | A. Main Frame Member Fracture | 20 |
48.8% |
12.1% |
6 |
8.7% |
3.3% |
13 |
18.1% |
5.7% |
39 |
21.3% |
6.8% |
| B. Front Caster Deformation | 11 |
26.8% |
6.7% |
3 |
4.3% |
1.6% |
16 |
22.2% |
7.0% |
30 |
16.4% |
5.2% |
|
| C. Tilt/Recline Locking Mechanism Failure | 3 |
7.3% |
1.8% |
4 |
5.8% |
2.2% |
16 |
22.2% |
7.0% |
23 |
12.6% |
4.0% |
|
| D. Seatback Cane Fracture | 3 |
7.3% |
1.8% |
5 |
7.2% |
2.7% |
6 |
8.3% |
2.6% |
14 |
7.7% |
2.4% |
|
| E. Deformation of Seat Support | 0 |
0.0% |
0.0% |
11 |
15.9% |
6.0% |
2 |
2.8% |
0.9% |
13 |
7.1% |
2.3% |
|
| F. Severe Downward Deformation | 0 |
0.0% |
0.0% |
1 |
1.4% |
0.5% |
9 |
12.5% |
3.9% |
10 |
5.5% |
1.7% |
|
| Seating-dependent Total | 32 |
78.0% |
19.4% |
29 |
42.0% |
15.9% |
53 |
73.6% |
23.2% |
114 |
62.3% |
19.8% |
|
| Seating-independent | G. Securement Bracket or Attachment Failure | 7 |
17.1% |
4.2% |
34 |
49.3% |
18.7% |
12 |
16.7 % |
5.3% |
53 |
29.0% |
9.2% |
| H. Footrest Failure | 7 |
17.1% |
4.2% |
9 |
13.0% |
4.9% |
15 |
20.8% |
6.6% |
31 |
16.9% |
5.4% |
|
| I. Deformation of Rear Wheel Assembly | 1 |
2.4% |
0.6% |
11 |
15.9% |
6.0% |
0 |
0.0% |
0.0% |
12 |
6.6% |
2.1% |
|
| Seating-independent Total | 18 |
43.9% |
10.9% |
52 |
75.4% |
28.6% |
26 |
36.1% |
11.4% |
93 |
50.8% |
16.2% |
|