Environmental Noise and Mental Health

We examined associations among adolescents living in urban centers for our primary analysis (N = 4,508), and include adolescents living in urban fringe areas (N = 3,304) and non urban areas (N = 2,311) in the Supplement. Urban areas were defined as central counties within standard metropolitan statistical areas (MSAs) and having populations ≥ 100,000. 

Translation;-                                                                                                                                                              Researchers took data/information from an Agency about 4,508 urban adolescents was interviewed. They made estimates from this information and predicted that noises above 55 decibels would create stressful environment creating limited sleeps and a lifetime of mental health DSM diagnoses. 

Adolescents may be particularly sensitive to negative health effects from environmental noise due to their increased need for sleep9 coupled with failure to meet sleep guidelines,10 and risk of mental disorder onset during this developmental period. 

Translation;-

Environmental noise like traffic and airport noise can leave lasting health issues  resulting from poor mental health, sleep deprivation and high/low blood pressure. Nighttime noises disturbs the sleep cycle leading to anxiety and mental problems. This problem affects 1 million disabilities annually in western Europe. Adolescence are more affected as they need more sleep and risk of developing onset mental disorder diagnosis  

The 4,508 urban-dwelling adolescent NCS-A participants lived in 2,751 block groups with an average Ldn of 57.2 dB (SD = 4.6). Nearly 91% of participants lived in communities where Ldn exceeded 55 dB (i.e., high-noise). Non- Hispanic Black and Hispanic/Latino participants more often lived in high-noise communities. 

Translation

Adolescence who live on blocks with high noise volume go to bed an average of 29 minutes later than others which do not live on this block. Their sleep Time ranges from 9 minutes later to 67.2 minutes of sleep delays on the weeknights and an average of 39 minutes ranging from 22.2 minutes to 55.8 minutes on weekend nights. This numbers do not reflect total hours slept, neither does it determine that the noise level is the cause of mental health as the confidence interval is very large.

Prior research suggests that noise sensitivity internal states that increase the likelihood of noise annoyance83. may modify the relation between noise and health. In adults, noise sensitivity has predicted onset of depressive and psychological symptoms.84 In adolescents, higher morning saliva cortisol levels were correlated with high noise annoyance and living in high-noise areas.85 We lacked a measure of noise sensitivity or annoyance, and so could not assess its effect. 

Translation;

Although living in areas with high noise pollution results in sleep disruption,  high saliva cortisol level and noise annoyance it does not result in any mental Health issues, in adolescents. Although there might be some correlation with individuals living in areas with high noise decibels with behaviours manifest /encourage mental health behaviours; there is no direct correlation that noise pollution reaching over 55 decibels causes mental health.

The study did not measure individuals’ sensitivity to noise or feelings of annoyance, making it difficult to determine how these factors may have influenced the relationship between noise exposure and health. Similarly, how individuals perceive or interpret noise may also affect its impact on health. It would be great if follow up research can do this.

I understood this paper but it was quite difficult to understand the result section, has it has lots of numbers. The confidence interval was also quite wide, and I had to research to fully understand the numbers.