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Previous studies involving asthma and cognitive functioning have produced inconclusive results. In addition, those studies rarely accounted for the age of asthma diagnosis and asthma treatment status. To assess the associations of asthma status or age at asthma diagnosis with cognition using the Telephone Survey of Cognitive Status, we thus analyze data from a large population-based sample. Further, we investigated the possibility that asthma treatment mediates these associations. This is a cross-sectional study from the Indonesian Family Life Survey Fifth Wave (IFLS-5) collected in 2014-2015. A weighted linear regression model was used to examine the associations between asthma and cognitive functioning scores in adults aged 50 years or older. Of the 6660 total samples included in this study, 176 participants had asthma (2.6%). We controlled for age, sex, and urbanicity with further adjustments for adult covariates or childhood covariates, as appropriate. There was no association between overall asthma status and cognitive functioning scores. However, asthma diagnosed at 0-19 years was associated with significantly higher cognitive functioning scores (Beta coefficient= 2.24, 95% CI: 0.62-0.87), compared to those without asthma. In the analysis involving current treatment status (restricted analysis), the significant association disappeared among those under current asthma treatment status, indicating that asthma treatment may mediate the association. Asthma might not be a risk factor for cognitive impairment. Observations of a significant association of pediatric asthma with higher cognitive scores need further investigation. Understanding cognitive functioning among older adults with asthma may improve the surveillance of cognitive decline in this age group.
Juber et al. (Tue,) studied this question.
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