Table 4.

Working with repetitive movement of the upper arm at the shoulder joint.

Study; Outcome	Exposure Parameter	Calculation of Lifetime Hours	Cumulative Exposure (Lifetime Hours of Highly Repetitive Work) †	OR Adjusted for Non-Occupational Factors (95% CI)
Dalbøge et al. 2014 [7] *	Repetition Years (1 Repetition Year = Performing Moderately Repetitive Work for 4 h/day for 1 year or Highly Repetitive Work for 1 h/day for 1 Year)
Outcome: subacromial impingement syndrome first-time surgery 2003-08 ICD-10: M19 orM75.1–M75.9. Men and women (n = 2,374,403 participants, of those 14,118 cases)	0	0 h	0 h	1.0
	>0–1	3 × 0.5 × 1 h/day × 220 days	330 h	1.2 (1.1–1.3)
	>1–2	3 × 1.5 × 1 h/day × 220 days	990 h	1.5 (1.5–1.6)
	>2–10	3 × 6 × 1 h/day × 220 days	3960 h	1.6 (1.5–1.6)
	>10–68	3 × 18 × 1 h/day × 220 days	11,880 h	1.9 (1.8–2.0)
Dalbøge et al. 2017 [16] **.N = 1564 Cases, 2234 Control Subjects	Repetition–Years (Calibrated into ‘Predicted Measured Job Exposures’, 1 Repetition Year Adds 25°/s to the Background Median Angular Velocity of Upper Arm Movements of 27°/s per day)
Outcome: subacromial impingement syndrome first-time surgery 2003-08 ICD-10: M19 or M75.1–M75.9. Men (n = 701 cases, 974 control subjects)	0			1.0 -
	>0–10 (mean 4.8)			1.7 (1.4–2.1)
	>10–17.5 (mean 12.7)			2.6 (1.5–4.6)
Women (n = 863 cases, 1260 control subjects)	0			1.0 -
	>0–10 (mean 5.5)			1.5 (1.2–1.9)
	>10–17.5 (mean 11.8)			2.0 (1.0–4.4)

* Dalbøge et al. (2014) [7] adjusted for time varying age (five categories), sex, region of residence (five regions), calendar year at start of follow up. † hours of highly repetitive work are given for Dalbøge et al. (2014). ** Dalbøge et al. (2017) [16] individually matched on sex, date of birth, adjusted for BMI, smoking (PY), leisure time shoulder intensive sports, diabetes mellitus, psychosocial strain, region of residence and additionally adjusted for demands and control.