Table 7 Construct validity: Confirmatory Factor Analysis of the Occupational Mechanical Job Exposure Index (one-factor model)

Original

435.45

0.000

Heavy lifting (> 20 kg) with Heavy physical work

19.18

0.084

.522

Heavy lifting (> 20 kg) with Awkward lifting

.392

Hands above shoulder height with Squatting/kneeling

.334

Hands above shoulder height with Awkward lifting

-.409

Heavy physical work with Squatting/kneeling

.183

Neck flexion with Forward bending

.758

Neck flexion with Awkward lifting

.229

Neck flexion with Standing/walking

.119

Exposures

Standarised factor loading^a

Standard error

Share exposed—Heavy lifting (> 20 kg)

.917

.010

Share exposed—Hands above shoulder height

.866

.015

Share exposed—Heavy physical work

.923

.009

Share exposed—Neck flexion

.551

.039

Share exposed—Squatting/kneeling

.834

.018

Share exposed—Forward bending

.819

.019

Share exposed—Awkward lifting

.950

.006

Share exposed—Standing/walking

.830

.018