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. 2012 Jul 11;27(11):1506–1512. doi: 10.1007/s11606-012-2130-5

Table 1.

Patient Characteristics During the Baseline Period

Total N = 2730 ICS N = 1541 LABA N = 966 IP N = 2155
Demographic/Behavioral
Age in years (m, sd) 66.1 (10.8) 65.8 (11.3) 66.0 (10.9) 66.4 (10.5)
Male (%) 97.1 97.1 97.1 97.4
Race (%)
 White 74.9 74.7 74.7 75.4
 Other 5.3 6.7 6.9 4.6
 Unknown 19.8 18.6 18.4 20.1
Smoker within past year (%) 41.1 35.7 35.3 43.9
Missed clinic visits (m, sd) 0.5 (1.0) 0.5 (1.1) 0.6 (1.1) 0.5 (1.0)
COPD Severity
FEV1 in percent-predicted (m, sd) 43.4 (20.8) 43.6 (19.9) 41.2 (19.1) 41.5 (20.7)
FEV1 in liters (m, sd) 1.7 (0.7) 1.7 (0.7) 1.6 (0.7) 1.7 (0.7)
≥1 inpatient COPD exacerbation (%) 4.7 5.7 5.8 5.2
≥1 outpatient COPD exacerbation (%) 23.0 26.7 29.6 25.1
Frequent exacerbators (%) 4.3 5.6 6.6 4.7
% with clinical COPD diagnosis 83.1 82.1 85.2 86.9
Comorbidities (%)
Asthma 23.8 33.7 32.9 17.5
Acute Coronary Syndrome 2.5 2.4 2.6 2.3
Congestive Heart Failure 12.6 12.5 13.3 13.0
Depression 20.6 19.6 18.3 20.6
Diabetes 17.9 19.0 20.3 16.8
Edema 6.2 6.2 5.6 6.4
Hypertension 55.8 54.5 53.8 56.5
Lung Cancer 3.1 2.7 2.8 3.3
Neuromuscular disease 0.3 0.3 0.2 0.3
Sleep Apnea 5.9 6.2 6.4 5.6
Schizophrenia 2.2 2.3 1.9 2.3
Medication classes (m, sd) 11.9 (6.4) 12.6 (6.5) 12.7 (6.5) 12.2 (6.5)
Medication adherence
% adherent to ICS 19.8
% adherent to LABA 30.6
% adherent to IP 25.6

*m = mean; sd = standard deviation