Comparison of alternative versions of the job demand-control scales in 17 European cohort studies: the IPD-Work consortium

Table 4 Correlation between the complete job control scale vs. shorter versions of the scale

Job control*	Belstress n = 21160	Gazel n = 11389	HeSSup n = 16833	SLOSH n = 10981	WOLF N n = 4707	WOLF S n = 5681
	r (95% CI)^†	r (95% CI)	r (95% CI)	r (95% CI)	r (95% CI)	r (95% CI)
Complete scale vs. B (5 items)	0.975 (0.975-0.976)	0.967 (0.966-0.969)	0.975 (0.974-0.975)	0.977 (0.976-0.977)	0.976 (0.975-0.978)	0.983 (0.982-0.984)
Complete scale vs. C (5 items)	0.974 (0.974-0.975)	0.973 (0.972-0.974)	0.975 (0.975-0.976)	0.959 (0.957-0.960)	0.957 (0.954-0.959)	0.971 (0.969-0.972)
Complete scale vs. D (5 items)	0.974 (0.973-0.975)	0.970 (0.969-0.971)	0.979 (0.978-0.979)	0.981 (0.980-0.982)	0.977 (0.975-0.978)	0.984 (0.984-0.985)
Complete scale vs. E (5 items)	0.967 (0.966-0.968)	0.960 (0.958-0.961)	0.972 (0.971-0.973)	0.960 (0.958-0.961)	0.968 (0.966-0.970)	0.978 (0.977-0.979)
Complete scale vs. F (2 items)	0.839 (0.835-0.843)	0.826 (0.820-0.831)	0.860 (0.856-0.863)	0.814 (0.808-0.821)	0.840 (0.831-0.848)	0.866 (0.860-0.873)

*Abbreviated items of the complete scale: 1. "Learn new things"; 2. "High level of skill"; 3. "Require creativity/initiative"; 4. "Repetitive work"; 5. "A lot of say"/"Deciding what to do"; 6. "Deciding how".
Version B include items: 1,2,4,5,6; version C items: 1,2,3,4,6; version D items:1,3,4,5,6; version E items: 1,2,3,4,5; and version F items: 3,6.
^†Pearson product-moment correlation coefficient (r) and 95% confidence interval (95% CI).

ISSN: 1471-2458