Prevalence of the use of self-tests by adults in the United Kingdom: a questionnaire survey

Towards a decision aid for self-tests: Users' experiences in The Netherlands

BACKGROUND

Self-tests enable the identification of (risk factors for) diseases and are carried out on the user's initiative without medical indication or advice and often unaided by a health professional. They are frequently used, and their availability and usage are expected to grow. Self-testing has both advantages and disadvantages. Making a well-informed decision about whether to self-test and which self-test to use is of major importance.

OBJECTIVE

To provide insights into the experiences of self-test users, identifying reasons to self-test and perceived (dis)advantages of using self-tests and the information highlighted as relevant by self-test users to make well-informed decisions.

METHODS

In a qualitative study, 28 users of a wide variety of self-tests shared their experiences in focus groups and interviews.

RESULTS

Perceived disadvantages of self-testing included the following: a wide range of available self-tests, lack of insights into their reliability and content, possibility of mistakes in administering them, possibility of false-positive and false-negative results, lack of clarity about how to interpret results and consequently what action to take and fear of not being taken seriously by a general practitioner. Self-test aspects that were viewed as most important include informed decision making, user-friendliness, usefulness and reliability of results.

CONCLUSION

A decision aid for future self-test users can help people make a deliberate decision on whether to use a self-test and which particular self-test to use from the wide range available. The government, health professionals, patient organizations, consumer organizations and citizens all have a role to play in the development and implementation of a decision aid.

Evaluation and enumeration of online test providers for sexually transmitted infections, specifically chlamydia, in the Netherlands

OBJECTIVES

Online testing for STIs might complement regular care provided by general practitioners or STI clinics. Two types of online testing can be distinguished, self-testing and self-sampling (sending sample to a laboratory for diagnosis). Online testing can occur without consultation with a healthcare professional, therefore information given by providers is essential for informed decision-making. We aimed to enumerate online test providers in the Netherlands focusing on chlamydia tests, to evaluate information using quality indicators and to gain insight on the proportion of online testing in the STI testing arena.

METHODS

We performed a systematic internet search to identify online STI test providers. Twenty quality indicators were evaluated on their websites; indicator scores were weighted by level of importance (expert opinion). High scoring providers were recommended, on the condition that the sensitivity and specificity of the test were above 95% and providers included a follow-up procedure in case of a positive result. Finally, providers were contacted to inquire about the number of sold tests, positivity rates and demographic characteristics of testers.

RESULTS

Five out of 12 identified self-sample test providers could be recommended, versus zero out of eight self-test providers. Self-sample test providers gave complete and correct information on more indicators (67%) compared with self-test providers (38%). In 2015, an estimated 30 000-40 000 self-sample tests were purchased, and 12 000-25 000 self-tests, which is roughly 10%-15% of the total number of STI tests.

CONCLUSION

This evaluation shows that some online self-sample test providers could be put forward as way of STI testing complementing regular testing options. None of the self-test providers were recommended. Regularly evaluating online test providers is advised to improve quality of the information on the websites. Finally, self-testing might not be suited for all populations as most information is provided in written format only.

Socio-demographic, health-related, and individual correlates of diagnostic self-testing by lay people: Results from a representative survey in Germany

Introduction

A broad range of self-tests (testing for e.g. HIV, cancer, hepatitis B/C) have become available and can be conducted by lay consumers without the help of a health professional. The aims of this study were to (a) investigate the prevalence of self-testing, (b) identify the most frequently used self-tests, and (c) explore the associations between socio-demographic, health-related and individual factors with self-testing.

Methods

A face-to-face plus paper-pencil cross-sectional survey was conducted. The sample consisted of 2.527 respondents who were representative of the German population in terms of the age, sex, and residence. Basic descriptive statistics and univariate logistic regression analyses were performed.

Results

8.5% of the participants reported having used one or more self-tests in the past, totalling 363 self-tests, with a mean of 1.7 (min. = 1, max. = 6). The three self-tests most frequently indicated were for detecting diabetes, bowel cancer, and allergies. Self-testers were older (Nagelkerke R² = .006, p < .01), had a higher BMI (Nagelkerke R² = .013, p < .001) and displayed more physical and mental fatigue (Nagelkerke R² = .031, p < .001) than non-testers. Self-testers also reported higher global life satisfaction values (Nagelkerke R² = .008, p < .01) and a higher educational level (Nagelkerke R² = .015, p < .01).

Conclusions

Self-testing is fairly prevalent in Germany Given the current shortage of physicians in Germany, especially in rural areas, and recent studies on the use of self-medication, the topic of self-testing has a great practical and socio-political relevance. Future studies should investigate further predictors of self-testing (e.g. contextual, situational and individual factors) as well as the emotional consequences of testing as a layperson without the attendance of a health professional.

Psychological, situational and application-related determinants of the intention to self-test: a factorial survey among students

BACKGROUND

The Internet enables an unprecedented opportunity to access a broad range of self-tests (e.g. testing for HIV, cancer, hepatitis B/C), which can be conducted by lay consumers without the help of a health professional. However, there is only little knowledge about the determinants of the use of self-tests. Thus, the aims of this study were (1) to experimentally investigate the impact of situational and application-related characteristics on the intention to use a self-test (ST), compared to being tested by a health professional at home (HPH) or at a doctor's office (HPD), (2) to examine the applicability of social-cognitive health behaviour theories on self-testing, and (3) to explore the advantages of integrating technological affinity into social-cognitive health behaviour models to predict self-testing.

METHODS

In a factorial survey, 1248 vignettes were rated by 208 students. The core concepts of social-cognitive health behaviour theories, technological affinity, and different situational and application-related characteristics were investigated.

RESULTS

Intention to ST was only predicted by the medical expertise of the tested person, while HPH and HPD were also associated with the application purpose of the test and the presence of an emotionally supporting person. Perceived severity and outcome-expectancy significantly predicted intention to self-test. Technological enthusiastic people had a higher intention to use a self-test.

CONCLUSIONS

Intention to ST, HPH and HPD were predicted by different situational and application-related characteristics. Social-cognitive health behaviour theories can be applied to predict self-testing and do not need to be extended by technological affinity.

Interpreting and acting upon home blood pressure readings: a qualitative study

Background

Recent guidelines recognize the importance of home blood pressure monitoring (HBPM) as an adjunct to clinical measurements. We explored how people who have purchased and use a home blood pressure (BP) monitor make sense of, and act upon, readings and how they communicate with their doctor about the practice of home monitoring.

Methods

A qualitative study was designed and participants were purposively recruited from several areas in England, UK. Semi-structured in-depth interviews were conducted with 18 users of home BP monitors. The transcribed data were thematically analysed.

Results

Interpretation of home BP readings is complex, and is often characterised by uncertainty. People seek to assess value normality using ‘rules of thumb’, and often aim to identify the potential causes of the readings. This is done by drawing on lay models of BP function and by contextualising the readings to personal circumstances. Based on the perceived causes of the problematic readings, actions are initiated, mostly relating to changes in daily routines. Contacting the doctor was more likely when the problematic readings persisted and could not be easily explained, or when participants did not succeed in regulating their BP through their other interventions. Most users had notified their doctor of the practice of home monitoring, but medical involvement varied, with some participants reporting disinterest or reservations by doctors.

Conclusions

Involvement from doctors can help people overcome difficulties and resolve uncertainties around the interpretation of home readings, and ensure that the rules of thumb are appropriate. Home monitoring can be used to strengthen the patient-clinician relationship.