An increasing number of studies examined the potential effects of ambient particulate matter
(PM: PM 2.5 and PM 10—PMs with diameters not greater than 2.5 and 10 μm, respectively)
pollution on the risk of depression and suicide; however, the results have been inconclusive.
This study aimed to determine the overall relationship between PM exposure and
depression/suicide based on current evidence. We conducted a systematic review and meta-
analysis of current available studies. Thirty articles (20 for depression and 10 for suicide) …

The article currently states that 'walking'was included in the calculation of moderate-to-
vigorous physical activity (MVPA). This is incorrect. Walking was categorised separately as
'light physical activity', while 'Strenuous exercise (eg jogging, swimming)'and 'hard
training/competition'were combined to form the MVPA category, as otherwise described.