Association of Serum Magnesium Levels with Frequency of Acute Exacerbations in Chronic Obstructive Pulmonary Disease: A Prospective Study

Table 1

The demographic characteristics of patients.

Parameters	= 89 (100%)
Age (year, mean ± sd) (range)	70.4 ± 7.8 (47–90)
Sex
Female (%)	1 (1%)
Male (%)	88 (99%)
BMI (kg/m^2)	25.5 ± 5.1
Smoking status
Smoker	19 (21%)
Ex-smoker	69 (78%)
Nonsmoker	1 (1%)
Comorbidities
HT	22 (25%)
Type 2 DM	13 (15%)
CAD	10 (11%)
BPH	6 (7%)
Bronchiectasis	4 (5%)
COPD stage
Stage I	0 (0%)
Stage II	18 (20%)
Stage III	49 (55%)
Stage IV	22 (25%)

: the number of patients; BMI: body mass index; mean ± sd: mean ± standard deviation; HT: hypertension; Type 2 DM: type 2 diabetes mellitus; CAD: coronary artery disease; BPH: benign prostatic hypertrophy.