TABLE 7.

Effects of occupational stress, psychological health and cytokine interactions on sleep in oil workers.

	B	SE	Waldχ2	P	OR	95% CI.
IL2*low occupational stress	−0.162	0.405	0.161	0.688	0.850	0.850–1.879
IL2*moderate occupational stress	−0.251	0.098	6.624	0.010	0.778	0.778–0.942
IL2*non-mental disorders	−0.922	0.083	122.225	<0.001	0.398	0.398–0.468

*Means interaction.