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Table 4 Areas of substantial improvement in the intervention group compared to baseline measures (where a concomitant improvement was not observed in the control group).

From: The effect of high correlated colour temperature office lighting on employee wellbeing and work performance

Area Description Percentage Improvement over baseline measure
Fatigue Item of original Columbia Scale 26.9%
Concentration Item of original Columbia Scale 36.8%
Daytime Alertness Item of original Columbia Scale 28.1%
Feelings of Weakness Item of original Columbia Scale 26.7%
Light-headedness Item of original Columbia Scale 33.7%
Sleepiness Item of original Columbia Scale 31.0%
Work Performance Additional item (derived from WHO-HPQ) 19.4%
Alertness & oncentration Additional item 22.9%
Vitality Combined measure from SF-36 28.4%
Mental Health Combined measure from SF-36 13.9%
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Journal of Circadian Rhythms

ISSN: 1740-3391

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