[Retracted] Analysis of Influencing Factors for Exercise Ventilation Efficiency of COPD Patients

Table 6

EqCO₂, RR, and VE at different exercise intensities by the GOLD stage.

	GOLD level 1	GOLD level 2	GOLD level 3	GOLD level 4	t value	value
Number of cases	9	44	21	2
EqCO2rest	32.33 ± 1.75	35.83 ± 1.02	39.64 ± 1.67	36.3 ± 2.26	−9.63	0.00
EqCO2at	29.46 ± 1.49	33.62 ± 0.87	35.58 ± 1.46	/	−5.68	0.00
EqCO2max	29.72 ± 1.32	32.99 ± 0.94	33.21 ± 1.39	29.05 ± 0.21	−0.657	0.51
RRrest	18.85 ± 5.31	21.95 ± 4.41	22.25 ± 5.94	23.5 ± 0.71	−0.38	0.71
RRat	24.86 ± 5.40	23.58 ± 3.66	26.70 ± 5.27	/	−2.26	0.03
RRmax	34.22 ± 7.43	31.05 ± 4.46	31.65 ± 6.02	30.0 ± 1.41	−0.52	0.61
%	79.7% ± 18,26	76.77 ± 16.56	76.38 ± 15.00	72.5 ± 3.54	0.02	0.98
VErest	15.71 ± 5.50	20.38 ± 5.51	20.31 ± 4.42	23.0 ± 5.66	0,10	0,92
VEat	28.30 ± 9.57	28.05 ± 8.07	31.31 ± 6.20	/	−1.32	0.19
VEmax	55.22 ± 9.24	48.61 ± 12.29	42.95 ± 10.09	32.5 ± 7.78	1.75	0.09
%	72.7 ± 14.97	60.15 ± 12.52	49.63 ± 10.76	36.5 ± 6.36	2.85	0.01

significant difference,  < 0.05.