Figure 4From: Mobile-phone-based home exercise training program decreases systemic inflammation in COPD: a pilot study Plasma levels of (A) tumor necrosis factor (TNF)-α and (B) interleukin (IL)-6 were measured at baseline, 1, 2, 3, 6 months in both groups. The sample size was 12 in the mobile phone group and 14 in the control group at each time point. *P < 0.05, **P < 0.01 ***p < 0.001 compared to the baseline levels of the control group.Back to article page