MRC-PHE Centre for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, Norfolk Place, London, W2 1PG, UK; National Institute for Health Research Health Protection Research Unit (NIHR HPRU) in Health Impact of Environmental Hazards, School of Public Health, Imperial College London, Norfolk Place, London, W2 1PG, UK.
School of Health Sciences, University of Tampere, FI-33014, Tampere, Finland; Radiation and Nuclear Safety Authority (STUK), 00811 Helsinki, Finland.
Int J Hyg Environ Health. 2018 Jan;221(1):1-8. doi: 10.1016/j.ijheh.2017.09.008. Epub 2017 Sep 20.
This study investigates validity of self-reported mobile phone use in a subset of 75 993 adults from the COSMOS cohort study. Agreement between self-reported and operator-derived mobile call frequency and duration for a 3-month period was assessed using Cohen's weighted Kappa (κ). Sensitivity and specificity of both self-reported high (≥10 calls/day or ≥4h/week) and low (≤6 calls/week or <30min/week) mobile phone use were calculated, as compared to operator data. For users of one mobile phone, agreement was fair for call frequency (κ=0.35, 95% CI: 0.35, 0.36) and moderate for call duration (κ=0.50, 95% CI: 0.49, 0.50). Self-reported low call frequency and duration demonstrated high sensitivity (87% and 76% respectively), but for high call frequency and duration sensitivity was lower (38% and 56% respectively), reflecting a tendency for greater underestimation than overestimation. Validity of self-reported mobile phone use was lower in women, younger age groups and those reporting symptoms during/shortly after using a mobile phone. This study highlights the ongoing value of using self-report data to measure mobile phone use. Furthermore, compared to continuous scale estimates used by previous studies, categorical response options used in COSMOS appear to improve validity considerably, most likely by preventing unrealistically high estimates from being reported.
本研究调查了在 COSMOS 队列研究的 75993 名成年人中，一小部分人自我报告的手机使用情况的有效性。使用 Cohen 加权 Kappa（κ）评估了 3 个月期间自我报告的和运营商提供的移动电话通话频率和持续时间之间的一致性。与运营商数据相比，计算了自我报告的高（≥10 次/天或≥4 小时/周）和低（≤6 次/周或<30 分钟/周）手机使用率的敏感性和特异性。对于使用一部手机的用户，通话频率的一致性为适度（κ=0.35，95%CI：0.35，0.36），通话持续时间的一致性为中度（κ=0.50，95%CI：0.49，0.50）。自我报告的低通话频率和持续时间表现出较高的敏感性（分别为 87%和 76%），但对于高通话频率和持续时间，敏感性较低（分别为 38%和 56%），反映出过度低估而不是高估的趋势。在女性、年龄较小的人群以及在使用手机期间/之后不久报告有症状的人群中，自我报告的手机使用有效性较低。本研究强调了使用自我报告数据来衡量手机使用情况的持续价值。此外，与之前研究中使用的连续尺度估计相比，COSMOS 中使用的分类响应选项似乎大大提高了有效性，这很可能是通过防止报告不切实际的高估计来实现的。
