A cross-sectional study was conducted in Korea to investigate the association between mobile phone usage and subjective symptoms in adults.
Health symptoms were assessed by the Headache Impact Test-6 (HIT-6), the Psychosocial Well-being Index-Short Form (PWI-SF), the Beck Depression Inventory (BDI), the Korean-Instrumental Activities of Daily Living (K-IADL), the Perceived Stress Scale (PSS), the Pittsburgh Sleep Quality Index (PSQI) and the 12-item Short Form Health Survey (SF-12).
The results of the follow-up 2 years later are published in Cho et al. (2016).
| Group | Description |
|---|---|
| Reference group 1 | average call duration: < 5 min |
| Group 2 | average call duration: ≥ 5 min |
| Type | Value |
|---|---|
| Total | 532 |
The median daily average number of mobile phone calls was five and the median of the average duration of one phone call was 1.5 minutes among the study participants..
The average daily number mobile phone calls showed a significant correlation with stress scores in women. Increased severity of headaches was observed in the group of subjects with an average duration of a mobile phone call of 5 minutes or longer (group 2) compared to group with an average duration of less 5 minutes (group 1). Mobile phone use was not significantly associated with stress, sleep, cognitive function, or depression.
The authors concluded that mobile phone call duration was associated with the severity of headaches.
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