Table 4.

Six-month follow-up of adults tested for AATD according to AAT levels

Diagnosis after AAT determination	Normal AAT levels (n=10,445)	Intermediate deficiency (n=607)	Severe deficiency (n=22)
COPD	106 (1)	5 (0.8)	2 (9.1)*
Emphysema	36 (0.3)	1 (0.2)	2 (9.1)**
Chronic bronchitis	18 (0.2)	2 (0.3)	0
Respiratory infections	3,090 (29.5)	148 (24.4)**	10 (45.5)*
Pneumonia	58 (0.6)	3 (0.5)	0
Spirometry	407 (2.9)	24 (4)	2 (9.1)
Referrals
Pneumology	229 (2.2)	22 (3.6)*	3 (13.6)*
Gastroenterology	489 (4.7)	42 (6.9)*	0
Internal medicine	73 (0.7)	2 (0.3)	1 (4.5)

Notes:

^*P<0.05 and

^**P<0.01 compared to individuals with normal levels of AAT. Data are expressed as n (%).

Abbreviations: AAT, alpha-1 antitrypsin; AATD, alpha-1 antitrypsin deficiency.