Table 2. Work schedule among Brazilian airline pilots.

Hours	n	%
Start of work in the day shift
From 12 a.m. to 4h59 a.m.	220	18.4
From 5 a.m. to 5h59 a.m.	584	48.7
From 6 a.m. to 6h59 a.m.	254	21.2
From 7 a.m. to 11 a.m.	140	11.7
End of work in the afternoon shift
From 4 p.m. to 9h59 p.m.	403	35.8
From 10 p.m. to 11h59 p.m.	562	49.9
From 12 a.m. to 6 a.m.	162	14.3
Start of work in the night shift
From 2 p.m. to 9h59 p.m.	687	59.3
From 10 p.m. to 11h59 p.m.	393	33.9
From 12 a.m. to 1h59 a.m.	44	3.8
From 2 a.m. to 4h30 a.m.	35	3.0
End of work in the night shift
Before 5h a.m.	598	51.6
From 5h01 a.m. to 8 a.m.	423	36.5
From 8h01 a.m. to 12 p.m.	127	11.0
From 12h01 p.m. to 4 p.m.	10	0.9