The Immediate Pulmonary Disease Pattern following Exposure to High Concentrations of Chlorine Gas

Table 5

Pulmonary function pattern and radiographic findings in patients who underwent spirometry.

Patient	Smoking; status	Percent; predicted		FEV1/FVC; ratio	LLN; FEV1/FVC; ratio	Hematology		Chest; radiographs		Pulmonary function pattern
		FVC	FEV1			Total; WBC^#	Neut*%	PE	IVM	ATS/ERS; Task force^£	Mannino et al.^¥ [16]	Graniteville; criteria^$
1	Current	59	43	0.55	0.63	9.3	73.8	Yes	Yes	O	Severe O	O
2	Current	40	37	0.75	0.71	14.2	Miss.	Yes	No	U	R	R
3	Current	50	58	0.79	0.67	15.2	Miss.	Yes	No	U	R	R
4	Current	45	45	0.85	0.74	19.7	Miss.	Yes	No	R	R	R
5	Nonsmoker	56	46	0.73	0.76	16	80	Yes	No	O	R	M
6	Nonsmoker	68	63	0.69	0.68	11	75	No	No	U	Moderate O	O
7	Nonsmoker	71	66	0.81	0.71	12.1	86	No	No	U	R	R
8	Nonsmoker	71	75	0.87	0.70	14.4	79.3	No	Yes	R	R	R
9	Nonsmoker	66	64	0.78	0.71	16.9	Miss.	Yes	No	U	R	R
10	Former	46	37	0.81	0.71	10.3	84	Yes	No	U	R	R

#×10³ cells/μL, *neutrophils.
PE: pulmonary edema; IVM: increased vascular markings; Miss.: missing.
O: obstructive pattern; R: restrictive pattern; M: mixed pattern; U: undetermined pattern.
^£Obstructive pattern: FEV1/VC ratio below LLN; Restrictive pattern: TLC below LLN or FEV₁/VC ratio ≥ 85% and a reduced VC; mixed: FEV₁/VC ratio and TLC below LLN.
^¥Obstructive pattern: mild: FEV₁/FVC ratio < 70%, FEV₁ ≥ 80% of predicted, moderate: FEV₁/FVC ratio < 70%, FEV₁ ≥ 50%–< 80% of predicted, severe: FEV₁/FVC ratio < 70%, FEV₁ < 50% of predicted; restrictive pattern: FEV₁/FVC ratio ≥ 70% and FVC < 80% of predicted.
^$Obstructive pattern: FEV₁/FVC ratio ≤ 0.70 and normal, reduced, or increased FEV₁ and FVC percent predicted; restrictive pattern FEV₁/FVC ratio ≥ 0.75, FEV₁ and FVC < 75% of predicted; mixed: FEV₁/FVC ratio > 0.70 and < 0.75 FEV₁ and FVC < 75% predicted.