Characteristic | MSCs group | Placebo group | p value |
---|---|---|---|
 | (n = 6) | (n = 6) |  |
Age (years) | 66.7 ± 20.4 | 69.8 ± 9.1 | 0.74 |
Sex, male/female | 6/0 | 5/1 | Â |
Causes of ARDS, n | Â | Â | Â |
  Pneumonia | 5 | 5 |  |
  Aspiration pneumonitis | 1 | 1 |  |
Baseline APACHE II score | 27.2 ± 6.4 | 23.0 ± 5.1 | 0.24 |
Baseline respiratory variables | Â | Â | Â |
  PaO2/Fi02 | 122.4 ± 42.0 | 103.5 ± 32.2 | 0.40 |
  Respiratory rate | 30.7 ± 3.3 | 34.0 ± 6.2 | 0.27 |
  PH | 7.42 ± 0.08 | 7.36 ± 0.24 | 0.56 |
Preexisting diseases | Â | Â | Â |
  Hypertention | 3 | 3 |  |
  Coronary artery disease | 1 | 1 |  |
  Neurologic disease | 5 | 3 |  |
  Chronic pulmonary disease | 1 | 0 |  |
  Diabetes | 2 | 1 |  |