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. Author manuscript; available in PMC: 2021 Nov 3.
Published in final edited form as: Hum Factors. 2014 Jun;56(4):669–683. doi: 10.1177/0018720813509268

Frequency Scores of Postures and Manual Handling for Nursing Assistants

Nursing Assistants
Index Inputs Baseline 3 Months 12 Months 24 Months 36 Months
T2 Moderate flexion .155 .141 .154 .129 .081
T3 Severe flexion .069 .072 .048 .035 .071
T4 Lateral bent/twist–neutral .069 .070 .041 .035 .017
T5 Lateral bent/twist–flexed .045 .062 .027 .022 .023
A2 1 arm >60° .190 .192 .137 .130 .083
A3 Both arms >60° .133 .159 .113 .086 .060
L3 Shallow squat .003 .004 .004 .005 .002
L4 Kneeling (one or both) .002 .003 .001 .001 .003
L5 Walking .237 .290 .234 .256 .287
L6 Deep squat .010 .007 .007 .006 .009
L7 Lunge .001 .002 .004 .003 .001
Wu 1 <4.55 kg (upright) .633 .624 .703 .752 .770
Wu 2 4.55–22.68 kg (upright) .025 .028 .025 .025 .035
Wu 3 >22.68 kg (upright) .002 .001 .001 .001 .003
Wi 1 <4.55 kg (inclined) .216 .202 .194 .160 .157
Wi 2 4.55–22.68 kg (inclined) .042 .057 .031 .025 .016
Wi 3 >22.68 kg (inclined) .010 .016 .003 .002 .001