2.

PPR组心肺功能情况（Mean±SD）

Pulmonary function of PPR group (Mean±SD)

	Pre-rehabilitation	Post-rehabilitation	t	P
ABG: arterial blood gas; pH: potential of hydrogen; PO2: partial pressure of oxygen; PCO2: partial pressure of carbon dioxide; SaO2: arterial oxygen saturation
FEV1 (L)	2.06±0.45	2.15±0.45	8.729	0.000
FVC (L)	3.16±0.68	3.18±0.67	0.702	0.487
PEF (L/s)	4.32±0.90	5.15±1.05	23.690	0.000
MVV (L/min)	86.69±16.56	88.16±17.83	1.636	0.109
ABG
pH	7.41±0.04	7.42±0.03	1.652	0.106
PO2 (mmHg)	73.91±6.46	74.14±5.73	0.848	0.401
PCO2 (mmHg)	42. 42±2.79	41.58±2.98	2.746	0.009
SaO2 (%)	93.77±2.81	93.67±2.53	0.599	0.553
Mild COPD
FEV1 (L)	2.16±0.44	2.22±0.47	6.822	0.000
FVC (L)	3.25±0.66	3.25±0.65	0.144	0.877
PEF (L/s)	4.53±0.75	5.34±0.91	18.960	0.000
MVV (L/min)	88.70±15.25	89.60±16.27	0.867	0.393
ABG
pH	7.40±0.03	7.41±0.03	1.668	0.106
PO2 (mmHg)	76.30±5.27	76.17±4.72	0.441	0.662
PCO2 (mmHg)	42.67±2.59	42.43±2.03	0.793	0.434
SaO2 (%)	94.90±2.29	94.63±2.11	1.393	0.174
Moderate to severe COPD
FEV1 (L)	1.85±0.42	2.01±0.41	11.954	0.000
FVC (L)	2.97±0.69	3.02±0.66	1.124	0.283
PEF (L/s)	3.85±1.06	4.72±1.26	14.254	0.000
MVV (L/min)	82.03±19.06	84.84±21.35	1.568	0.143
ABG
pH	7.42±0.04	7.42±0.02	0.393	0.701
PO2 (mmHg)	68.38±5.62	69.46±5.21	2.053	0.063
PCO2 (mmHg)	41.85±3.24	39.62±3.88	3.713	0.003
SaO2 (%)	91.15±2.08	91.46±2.03	1.298	0.219