Table 4 A comparison between the current and previous reviews for the level of evidence in support of modifier interventions for neck/upper extremity conditions.

Intervention condition/industry group	Evidence
	Strong	Moderate	Some	Insufficient
Modifier interventions
Exercise and neck/upper extremity musculoskeletal conditions (excluding fibromyalgia)			* † †	†
Exercise and fibromyalgia				*
Multiple modifier interventions (including exercise) and neck/upper extremity musculoskeletal conditions (excluding fibromyalgia)			*	† †
Multiple modifier interventions (including exercise) and fibromyalgia			*	†
Multiple modifier interventions (excluding exercise) and neck/upper extremity musculoskeletal conditions (excluding fibromyalgia)			*	† †
Multiple modifier interventions (excluding exercise) and fibromyalgia				* †

*Current review.

†Previous reviews (NB: includes multiple findings from different reviews. As descriptions for ratings of evidence may have varied between review papers, these have been aligned with the current rating system based on the wording used).