TABLE 4.
The differences in the anthropometrical characteristics of the Δirisin+ and the Δirisin− groups.
| Characteristic | Δirisin− (N = 67) | Δirisin+ (N = 14) | P-value |
| Age, (years) | 58.36 ± 8.05 | 57.79 ± 10.19 | 0.818 |
| BMR, (kcal) | 1547.57 ± 173.14 | 1485.21 ± 196.83 | 0.235 |
| BMI, (kg/m2) | 25.93 ± 2.62 | 27.40 ± 2.97 | 0.066 |
| FM, (kg) | 19.90 ± 5.05 | 24.40 ± 5.56 | 0.004** |
| FM% | 26.70 ± 5.45 | 32.14 ± 6.14 | 0.001** |
| VFA, (cm2) | 89.25 ± 25.67 | 113.09 ± 33.17 | 0.004** |
| WHR | 0.91 ± 0.05 | 0.94 ± 0.05 | 0.052 |
| FFM, (kg) | 54.52 ± 8.02 | 51.62 ± 9.11 | 0.233 |
| FFMI, (kg/m2) | 18.94 ± 1.76 | 18.49 ± 1.79 | 0.388 |
| SLM, (kg) | 51.51 ± 7.61 | 48.76 ± 8.60 | 0.233 |
| SMM, (kg) | 30.10 ± 5.56 | 28.76 ± 5.54 | 0.415 |
| SMMI, (kg/m2) | 10.44 ± 1.46 | 10.29 ± 1.18 | 0.719 |
| LTF | 2.910.82 | 2.210.56 | 0.003** |
| SVR, (kg/cm2) | 0.36 ± 0.12 | 0.27 ± 0.08 | 0.009** |
| Inbody score | 72.51 ± 5.40 | 67.64 ± 5.42 | 0.003** |
| Irisin before, (ng/ml) | 93.66 ± 80.00 | 155.94 ± 163.39 | 0.035* |
Continuous variables are represented by Mean ± standard deviation. Abbreviations: Δirisin+, the Δirisin ascending group; Δ irisin−, the Δirisin descending group; BMR, basal metabolic rate; BMI, body mass index; FM, fat mass; FM%, percent body fat; VFA, visceral fat area; WHR, waist to hip ratio; FFM, fat free mass; FFMI, fat free mass index; SLM, soft lean mass; SMM, skeletal muscle mass; SMMI, skeletal muscle mass index; LTF, lean-to-fat ratio; and SVR, skeletal muscle mass to visceral fat area ratio; Irisin before, the circulating irisin levels before ice swimming (baseline irisin levels). *P < 0.05 and **P < 0.01.