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Correlation plots of Work Ability Index (WAI) versus: hand grip strength, dominant hand; manual dexterity, measured using the Purdue Pegboard®, dominant hand; key grip/pinch key, dominant hand; pinch 3-chuck (three-digit pinch), dominant hand; HADS A and HADS D (Hospital Anxiety and Depression Scale; A = Anxiety; D = Depression). (*units in kg, explained in the Methods section).
