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Table 7 Summary of polychoric correlation matrix of variables job role, footwear worn and lower limb problem (full matrix in Additional file 2)

From: Identifying lower limb problems and the types of safety footwear worn in the Australian wine industry: a cross-sectional survey

Variables Correlation
Foot pain x Toe pain 0.8
Heel pain x Toe pain 0.8
Cellar Door x Sports shoes 0.6
Leg pain x Ankle pain 0.5
Leg pain x Foot pain 0.5
Knee pain x Gum boots 0.5
Toe pain x Office −0.9
Hip pain x Low-Mid cut safety shoes −0.9
Hip pain x Elastic sided boots −0.9
Heel pain x Dress shoes −0.9
Ankle pain x Elastic sided boots −0.9
Ankle pain x Dress shoe −0.9
Leg pain x Elastic sided boots −0.9
Office x Low-Mid cut safety shoes −0.8
  1. Moderate correlation 0.5 to 0.7, high correlation 0.7–1.0.
  2. Negative correlation indicates inverse relationship of variables