The GEE analyses in model 1–3.
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The dependent variable was the difference in the rating of neck/shoulder discomfort from baseline to after the four specific viewing conditions (ΔNeckMN, ΔNeckBM, ΔNeckMM, ΔNeckMP). In model 1 the main effects of all independent variables were analysed. In model 2, only the variables indicated by model 1 as making a significant contribution (p
创建时间：
2017-08-24
