Table 4: Mean change between gum and control conditions in well-being and performance during the workday.
 10 a.m. 11 a.m. 12 noon 2 p.m. 3 p.m. Results Cognitive problems −.03 (.13) −.03 (.18) −.27 (.2) −.11 (.17) −.41 (.22) Gum: F(1, 23) = 1.03, = .32, = .04Time*: F(2.68, 61.61) = 3.95, P = .02, = .15Gum × time: F(4, 92) = .41, P = .8, = .02 Job stress 0 (.25) −.07 (.25) −.17 (.17) −.32 (.21) −.24 (.18) Gum: F(1, 24) = .67, P = .42, = .03Time: F(2.82, 67.71) = 3.46, = .01, = .13Gum × time: F(2.01, 48.3) = .27, = .77, = .01 Fatigue −.16 (.32) −.24 (.36) −.25 (.39) −.9 (.4) −.81 (.45) Gum: F(1, 25) = 2.99, P = .1, = .11Time: F(2.08, 51.99) = 1.05, P = .36, = .04Gum × time: F(4, 100) = .86, P = .49, = .03 Anxiety 0 (.21) 0 (.16) −.4 (.17) −.07 (.1) .07 (.16) Gum: F(1, 26) = .19, P = .67, = .007Time*: F(4, 104) = 2.49, P = .047, = .09Gum × time: F(2.74, 71.31) = .1.32, P = .28, = .05 Depression .13 (.14) .18 (.13) −.03 (.14) .07 (.09) .14 (.15) Gum: F(1, 22) = .01, = .91, = .001Time: F(2.2, 47.9) = 2.04, = .14, = .09Gum × time: F(4, 88) = 1.51, P = .21, = 06
Standard errors of the means are in parentheses. indicates < .05; indicates = .01.