Table 1.

Baseline characteristics of participants by 1-yr readmission from index hospitalization

	Overall (N = 422)	Patients Not Readmitted (n = 290)	Patients Readmitted (n = 132)	P Value
Age, yr	64.8 ± 11.7	65.1 ± 12.0	64.3 ± 11.3	0.52
Male sex	212 (50.1)	74 (56.1)	138 (47.6)	0.11
African American	146 (34.5)	99 (34.1)	47 (35.6)	0.30
Body mass index, kg/m2	27.6 ± 8.3	27.7 ± 8.3	27.2 ± 8.2	0.58
Smoking history, pack-years	50.0 ± 26	49.7 ± 27.2	50.6 ± 24.3	0.78
Current smoker	276 (65.2)	188 (64.8)	100 (67.1)	0.74
FEV1 (% predicted)*	48.1 ± 18.7	50.2 ± 19.4	44.9 ± 17.3	0.05
FEV1/FVC*	52.5 ± 14.3	53.8 ± 14.9	50.6 ± 13.1	0.13
Serum sodium, mmol/L	136.7 ± 4.2	136.4 ± 4.3	137.4 ± 3.9	0.03
Serum bicarbonate, mmol/L	29.1 ± 7.0	28.9 ± 7.7	29.6 ± 5.3	0.36
Serum creatinine, mg/dl	1.1 ± 0.7	1.1 ± 0.7	1.1 ± 0.7	0.55
White blood cell count, 103/mm3	10.2 ± 4.7	10.3 ± 4.8	10.1 ± 4.6	0.63
Hematocrit	39.1 ± 6.1	39.3 ± 6.1	38.7 ± 6.3	0.37
Coronary artery disease	113 (26.7)	73 (26.4)	40 (31.0)	0.34
Atrial fibrillation	54 (12.8)	40 (14.4)	14 (10.9)	0.32
Congestive heart failure	107 (25.3)	75 (26.4)	32 (24.2)	0.64
Cerebrovascular accident	45 (10.6)	30 (10.3)	15 (11.4)	0.75
Hypertension	296 (70.0)	201 (69.3)	95 (72.0)	0.65
Diabetes mellitus	99 (23.4)	73 (25.2)	26 (19.7)	0.22
Chronic kidney disease	51 (12.1)	37 (12.8)	14 (10.6)	0.53
Obstructive sleep apnea	44 (10.4)	29 (10)	15 (11.4)	0.67
Gastroesophageal reflux disease	121 (28.6)	73 (25.2)	48 (36.4)	0.02
Depression	131 (31.0)	68 (23.4)	63 (47.7)	<0.001
Anxiety	89 (21.0)	51 (17.6)	38 (28.8)	0.009
Tobacco cessation counseling†	86 (31.2)	72/189 (38.1)	14/87 (16.1)	<0.001

Data are presented as mean ± SD or No. (%) unless otherwise specified.

^*Lung function date available on 202 participants.

^†276 current smokers.