[Retracted] Effect of Noninvasive Positive Pressure Ventilation on Prognosis and Blood Gas Level in COPD Patients Complicated with Respiratory Failure

Table 1

Comparison of general data.

Groups	Regular group (n = 36)	Research group (n = 42)	χ ^2/t
Age (years old)	65.31 ± 7.55	64.19 ± 8.41	0.614	0.541
BMI (kg/m^2)	23.55 ± 1.55	22.91 ± 1.70	1.726	0.088
Course of COPD (years)	8.97 ± 3.08	9.83 ± 3.14	1.217	0.228
Hypertension			2.069	0.150
With	14 (38.89)	10 (23.81)
Without	22 (61.11)	32 (76.19)
Diabetes mellitus			0.094	0.759
With	10 (27.78)	13 (30.95)
Without	26 (72.22)	29 (69.06)
Sex			0.290	0.590
Female	21 (58.33)	27 (64.29)
Male	15 (41.67)	15 (35.71)
Smoking history			0.079	0.779
Yes	20 (55.56)	22 (50.38)
No	16 (44.44)	20 (47.62)