Table 1

 Psychosocial work characteristics at phase 1 (1985–88) and phase 3 (1991–93) and change in psychosocial work characteristics between phases 1 and 3

Decision latitudeJob demandsWork social supports
*Change = phase 3−phase 1 score. †Paired t test for change in work score between phases 1 and 3. ‡“Stable” defined as change ⩽10 scale points. Increase and decrease defined as change >10 scale points.
All participants (n = 3817)
Mean score (SD) at phase 165.8 (15.8)58.1 (20.3)76.0 (18.3)
Mean score (SD) at phase 368.3 (14.9)61.7 (18.9)75.8 (17.5)
Mean change* (SD)2.5 (11.9)3.6 (19.6)−0.2 (19.7)
p value†p<0.0001p<0.0001p = 0.45
Number (%) with increased score926 (24)1196 (31)1113 (29)
Number (%) with stable score‡2407 (63)1868 (49)1472 (39)
Number (%) with decreased score484 (13)753 (20)1232 (32)
Stable employment grade (n = 2746)
Mean score (SD) at phase 164.7 (16.2)57.3 (20.6)75.5 (18.7)
Mean score (SD) at phase 366.3 (15.3)60.1 (19.1)75.7 (17.5)
Mean change* (SD)1.6 (11.8)2.9 (19.5)0.2 (20.1)
p value†p<0.0001p<0.0001p = 0.63
Number (%) with increased score603 (22)828 (30)812 (30)
Number (%) with stable score1758 (64)1353 (49)1066 (39)
Number (%) with decreased score385 (14)565 (21)868 (32)