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  3. What impact can mobile phones have on their users’ health? Many people worry about the supposed ill effects caused by radiation

What impact can mobile phones have on their users’ health? Many people worry about the supposed ill effects caused by radiation

admin2014-09-17  86
问题     What impact can mobile phones have on their users’ health? Many people worry about the supposed ill effects caused by radiation from handsets and base stations, despite the lack of credible evidence of any harm. But evidence for the beneficial effects of mobile phones on health is rather more abundant. Indeed, a systematic review carried out by Rifat Atun and his colleagues at Imperial College, London, rounds up 150 examples of the use of text-messaging in the delivery of health care. These uses fall into three categories : efficiency gains, public-health gains, and direct benefits to patients by incorporating text-messaging into treatment regimes. The study, funded by Vodafone, the world’s largest mobile operator, was published this week.
    Using texting to boost efficiency is not rocket science, but big savings can be achieved. Several trials carried out in England have found that the use of text-messaging reminders reduces the number of missed appointments with family doctors by 26-39%, for example, and the number of missed hospital appointments by 33-50%. If such schemes were rolled out nationally, this would translate into annual savings of ￡ 256m-364m.
    Text messages are also being used to remind patients about blood tests, clinics, scans and dental appointments. Similar schemes in America, Norway and Sweden have had equally satisfying results—though the use of text-message reminders in the Netherlands, where non-attendance rates are low, at 4%, had no effect other than to annoy patients.
    Text messages can also be a good way to disseminate public-health information, particularly to groups who are hard to reach by other means, such as teenagers, or in developing countries where other means of communication are unavailable. Text messages have been used in India to inform people about the World Health Organisation’s strategy to control tuberculosis, for example, and in Kenya, Nigeria and Mall to provide information about HIV and malaria. In Iraq, text messages were used to support a campaign to vaccinate nearly 5m children against polio.
    Finally, there are the uses of text messaging as part of a treatment regime. These involve sending reminders to patients to take their medicine at the right time, or to encourage compliance with exercise regimes or efforts to stop smoking. The evidence for the effectiveness of such schemes is generally anecdotal, however, notes Dr. Rifat. More quantitative research is needed which is why his team also published three papers this week looking at the use of mobile phones in health care in more details. One of these papers, written in conjunction with Victoria Franklin and Stephen Greene of the University of Dundee, in Scotland, reports the results of a trial in which diabetic teenagers’ treatment was backed up with text messaging.
    Diabetes needs constant management, and requires patients to take an active role in their treatment by measuring blood-sugar levels and administering insulin injections. The most effective form of therapy is an intensive regime in which patients adjust the dose of insulin depending on what they eat. This is more onerous for the patient, but allows for a greater dietary variety. Previous studies have shown that intensive treatment is effective only with close supervision by doctors. Dr. Franklin and her colleagues devised a system called Sweet Talk, which sends patients personalised text messages reminding them of the treatment goals they have set themselves, and allowing them to send questions to doctors. The Sweet Talk system was tested over a period of 18 months with teenage patients receiving both conventional and intensive diabetes treatment. A control group received conventional treatment and no text messages.
    The researchers found that the use of text-messaging significantly increased "self-efficacy" (the effectiveness of treatment, measured by questionnaire). More importantly, among patients receiving intensive therapy, the level of haemoglobin HbA1e—an indicator of blood-glucose and hence of glycaemic control— was 14% lower than for those in the control group. Since even a 10% decline in HbA1c level is associated with a reduction in complications such as eye and kidney problems, this is an impressive result. It suggests that texting can cheaply and effectively support intensive therapy among teenagers, who often demonstrate poor compliance.
    Despite such promising results, Dr. Rifat notes, many of the medical uses of text-messaging have not yet been subjected to clinical trials, because they are so new. And even where the benefits are proven, the technology has not been systematically deployed on a large scale. But when it comes to improving outcomes and reducing costs, text messages would seem to be just what the doctor ordered.  
Which of the following can be concluded from the first paragraph?
选项 A、That cell phones are harmful to people’s health is unconvincing.
B、Cell phones can bring more benefits to people than harm.
C、People won’t worry about the harm cell phones do any longer.
D、There are only three types of benefits cell phones bring us.
答案A
解析 推断题。由题干可知本题就首段内容提问，第二句提到：许多人担心手机手持装置及通信基站的辐射会对身体有害，不过始终缺乏可靠依据。这说明人们的“手机对人体健康有害”的观点只是一种猜测，缺乏有力的证据，故[A]为答案。第三句提到“关于手机对健康有益的证据却越来越多”，这只能说明手机对健康有好处，虽然“缺乏可靠依据”，也不能说明对健康无害，同理，也无法判断是弊多还是利多，[B]为过度推断。倒数第二句提到了“短信的三类用途”，但[D]中的only表示将意思绝对化，排除。首段没有提及人们在知道Rifat Atun的研究结论后反应如何，[C]无依据。  
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