Central Sensitization and Perceived Indoor Climate among Workers with Chronic Upper-Limb Pain: Cross-Sectional Study

Table 4

The relationship between pressure pain threshold (PPT) of the different muscles and chronic pain. We found no significant influence of job function, age, or smoking habits on PPT for either of the muscles.

Dependent variable: PPT
	Model 3			Model 4			Model 5
	Tibialis anterior			Extensor carpi radialis brevis			Infraspinatus
	LS mean	95% CI	value (-value)	LS mean	95% CI	value (-value)	LS mean	95% CI	value (-value)
Status			0.0023 (9.99)			<0.0001 (26.42)			0.0006 (13.03)
Chronic pain	805	701–910		639	554–725		573	494–652
Pain-free	1015	900–1130		918	824–1013		753	666–839
Job position			0.1021 (2.35)			0.1500 (1.95)			0.7458 (0.29)
Meat cutter	806	721–891		763	694–833		635	571–699
Meat packer	877	751–1003		694	591–797		655	561–750
Slaughterer	1047	841–1253		879	710–1048		698	543–854
Smoking			0.0593 (3.67)			0.1830 (1.81)			0.0980 (2.81)
Yes	977	847–1107		817	711–924		707	609–805
No	843	751–934		740	665–815		618	550–687

Statistically significant association between the PPT of respective muscle and status (chronic pain versus pain-free control) ().