Table 5.

Single breath carbon monoxide diffusing capacity at rest (adjusted for hemoglobin) of flight attendants categorized by their non-airline SHS exposure (N= 46)

Non-airline SHS Exposure	N (%)	%Predicted Diffusing Capacity *
None	6 (13)	75.8 ± 10.1
Childhood only	11 (24)	75.7 ± 11.5
Adulthood only	12 (26)	77.6 ± 11.2
Childhood & Adulthood	17 (37)	81.8 ± 11.7
Total	46 (100)	78.5 ± 11.3

Number of flight attendants in each category is reported as number (percentage) and diffusing capacity is reported as mean ± SD. Data was available for 46 flight attendants only. Significance based on one-way ANOVA for differences in the means of diffusing capacity between categories was p<0.50.

Adulthood exposure included domestic and occupational sources of exposure.