Table 2: Scheffe test assessment of differences in work ability between types of shifts worked.

Dependent Variable
(I) work shift		 (J) work shift Mean Difference (I-J) Std. Error Significance
Fixed 8 hour rotating 8 hour
fixed 12 hours
rotating 12 hour		 -.99321
3.26099
3.98172*		 1.14044
1.62645
1.34622		 .859
.261
.034
Rotating 8 hour fixed 12 hours
rotation 12 hours		 4.25420*
4.97493*		 1.31716
.94968		 .016
.000
fixed 12 hour rotating 12 hour .72073 1.49887 .972

* Significant at the 0.05 level.