It also proves that tobacco is a 'gateway drug', one that leads users to other potent drugs.
Lead author Dr T S Jaisoorya said in a release that they took up the study to evaluate psychological issues among school going adolescents who often have multiple vulnerabilities.
A high 76.3 per cent of lifelong tobacco users - those who had smoked or used smokeless tobacco throughout their life - had failed in a subject compared to 57 per cent of non-users, the release said.
The study also found that tobacco users had significantly higher usage rates of alcohol and illicit drugs.
More From This Section
Alcohol use among lifelong tobacco users was found to be 67.8 per cent as compared to 11 per cent in non-users.
In the case of illicit drugs, the rates of use were 33 per cent versus 6.1 per cent in tobacco users and non-users respectively.
These findings recently published in the Indian Journal of Medical Research are part findings of the larger study looking at psychological issues among adolescent school students, done by the Bengaluru-based National Institute of Mental Health and Neurosciences (NIMHANS).
In what could be good news to enforcement officials, the study reports decreasing trend of tobacco use among adolescent high school students compared to previous studies done among students in South India, and in Kannur district.
In the survey, 6.9 per cent students reported having used tobacco in any form, with the proportion of males using tobacco being 12.5 per cent and females 1.2 per cent.
Most users still initiated early with the mean age of initiation among users being 14 years.