Table 2.

Explanatory Variables Associated With POMS Scores

POMS scale	Entire model		P-values of explanatory variables
	R2adj	P-value	Age	Sex	Occupational group	Watchstanding status	Watch schedule type (fixed, rotating)	Daily sleep duration
Total mood disturbance (TMD)a	0.096	<0.001	<0.001	0.936	0.247	0.030	<0.001	0.032
Tension-anxietya	0.049	<0.001	0.003	0.952	0.256	0.108	0.001	0.213
Depressiona	0.044	<0.001	0.003	0.748	0.308	0.182	0.022	0.328
Vigor-activity	0.091	<0.001	0.062	0.109	0.348	0.103	0.937	0.342
Anger-hostilitya	0.101	<0.001	<0.001	0.101	0.184	0.136	<0.001	0.012
Fatiguea	0.101	<0.001	0.147	0.820	0.725	<0.001	<0.001	<0.001
Confusion-bewildermenta	0.048	<0.001	0.007	0.604	0.740	0.110	<0.001	0.079

Analysis conducted on data from 663 Sailors with questionnaire and actigraphy data after we excluded Sailors standing watch on atypical schedules or two-section fixed schedules (none of the Sailors was working two-section rotating schedules). Results adjusted for ship.

^aBox-Cox transformation applied.