TY - JOUR T1 - Correspondence on: Neurocognitive impairment in night and shift workers: a meta-analysis of observational studies by Vlasak <em>et al</em> JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 790 LP - 790 DO - 10.1136/oemed-2022-108514 VL - 79 IS - 11 AU - Philip Tucker Y1 - 2022/11/01 UR - http://oem.bmj.com/content/79/11/790.abstract N2 - When considering the impact of shiftwork on cognitive performance, there is an important distinction to be drawn between acute temporary effects and chronic impairments. Acute effects are typically observed in individuals who are, for example, working a block of night shifts and are experiencing fatigue due to the transient influence of inadequate sleep and circadian misalignment.1 Chronic effects (if they exist) are observable when individuals with prolonged exposure to shiftwork show deficits in cognitive capacity, irrespective of the type of shift they have worked in recent days and may even be observable in former shiftworkers. The distinction is important because it is likely that different mechanisms … ER -