Smoking related attention alteration in chronic obstructive pulmonary disease-smoking comorbidity

BMC Pulmonary Medicine

Table 1 Demographic characteristics of COPD and NonCOPD group

Characteristics	COPD(n = 42) Mean ± SD	NonCOPD (n = 43) Mean ± SD	p
Age	69.64 ± 8.00	68.30 ± 8.50	0.456
Gender (female/male)	14/28	13/30	0.759
Education	5.76 ± 4.79	5.77 ± 4.20	0.995
Smoking/nonsmoking	20/22	22/21	0.590
Smoking index	796.25 ± 391.80	745.68 ± 358.56	0.665
Smoking history	41.60 ± 9.36	38.82 ± 11.58	0.400
FEV1%	52.36 ± 17.05	102.14 ± 9.96	< 0.001
FVC%	65.91 ± 15.59	90.00 ± 6.97	< 0.001
FEV1/FVC	56.31 ± 8.83	87.14 ± 5.01	< 0.001

The smoking index was calculated by (years of smoking) * (number of cigarettes smoked per day). The smoking history was the years of smoking. FEV1%: forced expiratory volume in one second. FVC%: forced vital capacity

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