Age for First Mobile Phone Less Critical Than Usage, Study Finds

A study from the University of Pennsylvania's Hospital indicates that the age at which adolescents receive their first mobile phone may be less critical than previously thought. The research suggests that acquiring a smartphone at 13 years old does not, by itself, lead to a greater risk of mental health issues.

However, the study, published in JAMA, highlights that the duration of phone use is a significant factor. Excessive usage, especially during nighttime hours, is associated with an increased probability of developing depression, obesity, and sleep deprivation. Lead author Ran Barzilay noted that while getting a phone at 13 appears safe, the amount of time spent on it, particularly at night, is of great importance.

This finding contrasts with a previous study by the same team, which had linked acquiring a phone at age 12 to poorer mental health. The current research tracked 1,959 adolescents for a year. Of these, 1,230 gained access to their first mobile phone, while 729 did not. The purchase was not significantly associated with depression or obesity, but it was linked to insufficient sleep (less than eight hours) by age 14.

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The acquisition of the first mobile phone at 13 years of age does not, in itself, lead to a worsening of mental health, although the duration of its use and specifically the nighttime use "takes on great importance."

Barzilay advises that while delaying the first phone until 13 seems safe, families should establish limits on usage duration and nighttime access. He recommends keeping smartphones out of bedrooms at night and limiting overall excessive use to protect adolescent well-being.

The study divided participants based on daily usage hours, ranging from less than two to over five. Results showed that using a phone for more than five hours daily was broadly associated with negative outcomes, including depression, obesity, and lack of sleep, when compared to using it for less than two hours.

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Our data suggest that acquiring it at 13 is safer than at earlier ages, provided that some limits are set regarding the duration of use and nighttime access.