Table 2.

Distributions of OWAS-AL related to lifting technique, implant, and their combinations.

	Lifting technique
	Stoop lifting (43,065 observations) AL1 = 42% AL2 = 58%	Squat lifting (37,687 observations) AL1 = 41% AL2 = 9% AL3 = 50%
Implant
HI (43,129 observations)  AL1 = 40%  AL2 = 33%  AL3 = 27%	21,475 observations AL1 = 42% AL2 = 58%	21,654 observations AL1 = 39% AL2 = 8% AL3 = 53%
VBR (19,775 observations)  AL1 = 43%  AL2 = 38%  AL3 = 18%	11,990 observations AL1 = 43% AL2 = 57%	7,785 observations AL1 = 44% AL2 = 9% AL3 = 47%
KI (17,848 observations)  AL1 = 41%  AL2 = 38%  AL3 = 22%	9,600 observations AL1 = 40% AL2 = 60%	8,248 observations AL1 = 41% AL2 = 12% AL3 = 47%

HI = hip implant, VBR = vertebral body replacement, KI = knee implant, AL1 = action level 1, AL2 = action level 2, AL3 = action level 3.