Corrigendum: Neighborhood disadvantage is associated with actigraphy-assessed sleep continuity and short sleep duration (Sleep DOI: 10.1093/sleep/zsy140)

Abstract

A previously published version of this manuscript found a significant association between objective measurements of street lighting and neighborhood disorder and sleep outcomes; however, while preparing an unrelated paper, we determined that there was an error in the coding of objective measurements of street features (i.e. street lighting, disorder, and walkability). Specifically, the approach we used to derive person-level exposure variables from street segment-level observations of disorder, street lighting, and walkability inflated some of the neighborhood features. In accounting for different lengths of street segments, we scaled (or standardized) each street segment's length to one-tenth of a mile. However, we now have determined that this scaling inflated the values of segments shorter than one-tenth of a mile, while it minimized the values of street segments longer than one-tenth of a mile. That is, shorter street segments received a weight greater than 1 while longer street segments received a weight less than or equal to 1, leading to inaccurate upweighting of shorter street segments. Thus, our procedure led to a systematic bias in objectively coded neighborhood characteristics, and a misrepresentation of the underlying street- level features. The primary findings of this paper, specifically the significant associations between perceived safety and objectively measured crime, remain unchanged. However, the significant associations between street lighting and neighborhood disorder and sleep efficiency, wakefulness after sleep onset (WASO) and categorical measure of sleep duration were no longer significant, after correcting for this error in the objective measures of street lighting and neighborhood disorder. Corrected results are presented herein. The authors accept full responsibility for the data file processing miscalculations that led to the errors in the original publication of this manuscript, and sincerely regret any inconvenience this may have caused.