Table 2.
Functional capacity and quality of life according to iron deficiency.
| Iron Deficiency | No Iron Deficiency | p Value | |
|---|---|---|---|
| 6-min walking test (6MWT) | N = 309 | N = 116 | |
| Meters walked | |||
| Overall, N = 202 and N = 80 | 270.7 ± 94.0 | 310.0 ± 108.9 | 0.005 |
| Non-anemics, N = 94 and N = 50 | 286.8 ± 90.2 | 327.9 ± 112.1 | 0.028 |
| N of subjects that walked >300 m | 72 (35.6) | 47 (58.8) | <0.001 |
| N of subjects unable to complete the test | 59 (29.2) | 13 (16.3) | 0.041 |
| N of subjects that developed symptoms | 77 (38.1) | 22 (27.5) | 0.12 |
| N of subjects unable to undergo the test | 107 (34.6) | 36 (31.0) | 0.56 |
| Minnesota living with HF questionnaire (MLHFQ) | N = 325 | N = 122 | |
| Overall summary score (min: 0, max: 105) | |||
| Overall, N = 325 and N = 122 | 49.4 ± 22.44 | 43.1 ± 23.2 | 0.01 |
| Non-anemics, N = 130 & N = 68 | 46.4 ± 26.4 | 43.8 ± 24.0 | 0.46 |
| Composite scores | |||
| Physical dimension (min: 0, max: 40) (sum of items: 2, 3, 4, 5, 6, 7, 12, 13) |
28.4 ± 12.1 | 25.4 ± 12.7 | 0.025 |
| Emotional dimension (min: 0, max: 25) (sum of items: 17, 18, 19, 20, 21) |
8.2 ± 6.0 | 6.9 ± 6.4 | 0.06 |
| Socioeconomic dimension (min: 0, max: 10) (sum of items: 14, 15) |
4.0 ± 2.7 | 3.5 ± 2.7 | 0.09 |
| Social and personal dimension (min: 0, max: 25) (sum of items: 7, 8, 9, 10, 11) |
8.5 ± 6.7 | 6.9 ± 6.3 | 0.018 |
Data presented as mean ± SD or N (%).