Table 2 Timing between AATD and COPD diagnoses stratified by time period
From: Medical costs of Alpha-1 antitrypsin deficiency-associated COPD in the United States
AATD-associated COPD subgroup | AATD-COPD Cohort | |||
|---|---|---|---|---|
N = 953 | ||||
Mean difference (years) | SD | Median | Range | |
AATD diagnosis before COPD diagnosis (N = 114; 12%)a | ||||
 2000 - 2009 | 1.17 | 1.12 | 0.9 | 4.27 |
 2010 - 2017 | 1.77 | 1.87 | 1.33 | 9.75 |
AATD diagnosis after COPD diagnosis (N = 802; 84%)a | ||||
 2000 - 2009 | 5.42 | 3.82 | 4.84 | 17.38 |
 2010 - 2017 | 2.39 | 1.8 | 1.62 | 7.67 |