Table 2.
Fat-Free Mass Index Across Different Demographic Characteristics
| n (%) | FFMI (kg/m2) | P | |
|---|---|---|---|
| Age (years) | < 0.001a | ||
| ≤60 | 23 (18.70) | 18.63 ± 1.54 | |
| >60 | 100 (81.30) | 17.23 ± 1.83 | |
| Gender | 0.014a | ||
| Male | 116 (94.31) | 17.59 ± 1.82 | |
| Female | 7 (5.69) | 15.83 ± 1.80 | |
| Educational level | 0.638b | ||
| Primary school or less | 52 (42.28) | 17.30 ± 2.03 | |
| Secondary/high school | 62 (50.40) | 17.63 ± 1.67 | |
| College/university or higher | 9 (7.32) | 17.63 ± 2.03 | |
| Occupation | 0.014b | ||
| Retiree | 56 (45.53) | 17.17 ± 1.56 | |
| Farmer | 51 (41.46) | 17.46 ± 2.07 | |
| Other worker | 16 (13.01) | 18.70 ± 1.70 | |
| Marital status | 0.777a | ||
| Married | 119 (96.75) | 17.48 ± 1.87 | |
| Widowed | 4 (3.25) | 17.75 ± 1.68 | |
| Smoking status | 0.468b | ||
| Nonsmoker | 13 (10.57) | 17.39 ± 1.66 | |
| Ex-smoker | 71 (57.72) | 17.66 ± 1.88 | |
| Current smoker | 39 (31.71) | 17.21 ± 1.87 | |
| BMI (kg/m2) | <0.001b | ||
| < 21 | 43 (34.96) | 15.87 ± 1.28 | |
| 21–25 | 52 (42.28) | 17.65 ± 1.11 | |
| 25–30 | 25 (20.32) | 19.46 ± 1.03 | |
| ≥ 30 | 3 (2.44) | 21.60 ± 0.77 | |
| Disease course (years) | 0.685b | ||
| <5 | 70 (56.91) | 17.48 ± 1.86 | |
| 5–15 | 33 (26.83) | 17.34 ± 1.80 | |
| >15 | 20 (16.26) | 17.79 ± 2.01 | |
| mMRC dyspnea score | 0.031b | ||
| 0 | 14 (11.38) | 18.38 ± 1.93 | |
| 1 | 78 (63.41) | 17.62 ± 1.87 | |
| 2 | 23 (18.70) | 16.84 ± 1.50 | |
| 3 | 8 (6.51) | 16.51 ± 1.82 | |
| CAT score | 0.001a | ||
| <10 | 8 (6.51) | 19.52 ± 1.86 | |
| ≥10 | 115 (93.49) | 17.35 ± 1.78 |
Notes: aAge, gender, marital status, and CAT score were assessed using t-tests. bOther parameters were compared via one-way ANOVA.
Abbreviations: BMI, body mass index; FFMI, fat-free-mass index; mMRC, modified Medical Research Council; CAT, COPD Assessment Test.