Lilian Lechner

Determinants of physical activity among the older adults: a literature review.

Abstract Understanding the determinants of changing physical activity among older adults is crucial for effective intervention development. The aim of this study was to review and update the evidence relating to the determinants of physical activity initiation and maintenance among older adults, and to explore the main similarities and dissimilarities in determinants between the two phases. Only longitudinal and experimental studies were used to assess the level of evidence. Fifty-nine longitudinal observational and experimental studies were identified. Recent studies were identified that focused on some recently developed concepts, especially in the field of the post-motivational concepts and several environmental determinants in predicting physical activity initiation and maintenance. Furthermore, dissimilarities were found in determinants between physical activity initiation and maintenance. It can be concluded that determinants are to a large degree phase-specific, which should be taken into account during further investigation, theory development and intervention development. Further investigation is needed to study the importance of promising concepts, such as post-motivational and environmental determinants. Recommendations for further empirical research, theory development and intervention development are outlined in this review.

A qualitative study on detecting cancer symptoms and seeking medical help; an application of Andersen’s model of total patient delay

Patient delay is the interval between the day someone first becomes aware of an unexplained symptom and the day they seek medical consultation. This pre-diagnostic period is comprised of several stages which may involve delay on the part of the individual. This study investigated factors influencing the process of detecting cancer symptoms and consulting a general practitioner (GP). Twenty-three patients were interviewed about their experiences during this process. Among factors stimulating the process of detection and consultation were associating symptoms with cancer, and discussing symptoms with others. Being ashamed or embarrassed about the symptoms and attributing symptoms to common ailments were among the impeding factors. The findings of the present study suggest that future health education on early detection of cancer should focus on increasing knowledge and providing positive information about early detection of cancer. It is recommended that educational materials be disseminated to the general public via more channels, including non-medical channels.

Misconceptions of Fruit and Vegetable Consumption: Differences between Objective and Subjective Estimation of Intake

Abstract This study reports the discrepancy between two methods to assess fruit and vegetable consumption in a Dutch adult population (N = 367). The consumption of fruit and vegetables was assessed by telephone interviews in two ways: it was estimated objectively by using a food frequency method (the number of grams of fruit and vegetables that subjects ate every day), and it was estimated subjectively by assessing the self-rated fruit and vegetable intake of subjects. Besides behavior, intention was measured in two ways: the intention to eat fruit and vegetables each day and the intention to eat more fruit and vegetables. Also, determinants were measured using a theoretical model including the attitude toward fruit and vegetable consumption, self-efficacy expectation, and the social influence to eat fruit and vegetables. Results show that there were large differences between the self-rated and estimated objective consumption of fruit and vegetables. Subjects rated their own intake as much higher than their estimated objective intake. Furthermore, multiple regression analyses show that the determinants predicted the self-rated consumption much better than the estimated objective consumption. Subjects who rated their own consumption as high had more positive beliefs concerning fruit and vegetable consumption, experienced more positive social influence to eat fruit and vegetables, and had higher self-efficacy expectations of being able to eat fruit and vegetables than subjects who rated their own consumption as low. It is concluded that nutrition education aimed at stimulating fruit and vegetable consumption should especially focus on making people aware of their own fruit and vegetable intake, in addition to changing attitudes and self-efficacy expectations.

The role of illness representations in coping and health of patients treated for breast cancer

Objective: The present study examined the relation of cognitive and emotional representations of illness specified by the Common Sense Model of Illness Cognition (Handbook of Psychology and Health: Social Psychological Aspects of Health. Earlbaum, Hillsdale: New York, 1984; 219–252) with the coping strategies and perceived health of patients who were treated for breast cancer.

Efficacy of Two Tailored Interventions Promoting Physical Activity in Older Adults

BACKGROUND Important health benefits can be obtained if effective low-cost interventions promoting physical activity, especially among older adults, are developed. DESIGN This RCT investigated the efficacy of two tailored physical activity interventions in promoting awareness, initiation, and maintenance of physical activity among older adults compared to a wait-list control group. Data were collected in 2007. Analyses were conducted in 2008. SETTING/PARTICIPANTS In total, 1971 Dutch older adults (mean age=64 years, 57% women) participated. INTERVENTION Two tailored physical activity interventions, consisting of three tailored letters delivered during 4 months, were systematically developed. The basic tailored intervention targeted psychosocial determinants alone, while the environmentally tailored intervention (intervention-plus) additionally targeted environmental determinants. MAIN OUTCOME MEASURES Awareness of personal physical activity behavior, self-reported level of physical activity, and compliance with the physical activity guideline were assessed at baseline, 3 months, and 6 months. RESULTS Intervention participants became more aware of their personal physical activity level at 6 months (OR(Ibasic)=1.7, OR(Iplus)=1.6) and were significantly more physically active at 3 (EffectSize[ES](Ibasic)=0.20, ES(Iplus)=0.20) and 6 months (ES(Ibasic)=0.30, ES(Iplus)=0.35) when compared to control participants. Moderation analyses showed that the interventions enhanced physical activity initiation at 3 (ES(Ibasic)=0.26, ES(Iplus)=0.21) and 6 months (ES(Ibasic)=0.32, ES(Iplus)=0.27) among participants insufficiently active at baseline, and induced maintenance at 6 months among participants sufficiently active at baseline (ES(Ibasic)=0.33, ES(Iplus)=0.34) when compared to the control condition. No differences between the intervention arms were found. CONCLUSIONS The results indicate that tailoring can be an effective tool in attaining and enhancing awareness, initiation, and maintenance of physical activity among older adults. Targeting environmental determinants in addition to psychosocial determinants, however, did not result in an additional increase in physical activity behavior. TRIAL REGISTRATION This study was registered with the Dutch Trial Register NTR 920.

Care needs after primary breast cancer treatment. Survivors' associated sociodemographic and medical characteristics

This study examines the care needs of rehabilitating breast cancer survivors and determines what sociodemographic and medical characteristics are associated with these care needs.

The long-term efficacy of two computer-tailored physical activity interventions for older adults: main effects and mediators

OBJECTIVE Low-cost (e.g., computer-tailored) interventions with sustained effects are needed to increase and maintain physical activity in older adults. This study examined the long-term efficacy of 2 computer-tailored physical activity interventions for older adults and its psychosocial and environmental mediators. METHODS A clustered randomized controlled trial (N = 1,971) was conducted that included 3 research arms: (a) basic computer-tailored print intervention, targeting psychosocial mediators; (b) environmentally computer-tailored print intervention, targeting psychosocial and environmental mediators; and (c) no-intervention control group. Interventions were developed using the intervention mapping approach and consisted of 3 computer-tailored letters delivered over 4 months. Questionnaires assessed the study outcomes (i.e., total weekly days and total weekly minutes of physical activity) at baseline and 12 months. Potential mediators (i.e., awareness, attitude, self-efficacy, intention, social influence, intrinsic motivation, self-regulation, and perceived environment) were assessed at baseline and at 3 or 6 months. RESULTS Multilevel regression analyses revealed that both interventions significantly changed total weekly days of physical activity compared with the control group, but only the environmentally computer-tailored print intervention significantly changed weekly minutes of physical activity. Multiple mediation models showed that the effects of both interventions on weekly days of physical activity were mediated by changes in awareness and intention. CONCLUSIONS Computer-tailored interventions were effective in inducing long-term behavioral changes in physical activity behavior of older adults. Awareness and intention were found to be important mediators of changing daily physical activity and should be included in future computer-tailored intervention studies.

Measuring risk perceptions of skin cancer: Reliability and validity of different operationalizations

OBJECTIVE Risk perceptions play a pivotal role in health behaviour theories. Accurate measurement is essential in order to investigate the explanatory value and effectiveness of interventions influencing these beliefs. This study investigated the reliability and predictive validity of different risk perception operationalizations related to skin cancer and sunscreen use in order to explain the inconsistent findings in literature regarding the relationship between risk perceptions and (cancer related) behaviours. DESIGN AND METHODS Two on-line surveys were conducted. Study 1 (N= 175) was conducted among university students to investigate the test-retest reliability of different operationalizations of perceived likelihood and perceived severity and to assess their correlations with sunscreen use. Study 2 (N= 418) was a prospective study among Dutch adults and assessed longitudinal correlations between the different operationalizations and sunscreen use. RESULTS Internal consistency (alpha) ranged between .13 and .90 for likelihood measures and between .37 and .88 for severity measures. Test-retest correlations (r/ICC) ranged between .51 and .82 for the likelihood measures and between .58 and .75 for the severity measures. Conditional likelihood estimates, particularly when phrased affectively (feeling at risk), and comparative severity questions were the strongest correlates of behaviour. CONCLUSION Conditional likelihood and comparative severity might be better predictors of health behaviour than commonly used operationalizations of risk perception. These measures may be relevant for use in the development and evaluation of intervention programmes, and should be acknowledged by health behaviour theories. Suggestions for future research are discussed.

Social psychological correlates of paying attention to cancer symptoms and seeking medical help

Social psychological correlates of two main aspects of the process of cancer detection, viz. passive detection (i.e., paying attention to cancer symptoms) and help-seeking intention, were studied among a-symptomatic Dutch adults. Two written questionnaires, with a six-week interval, identified correlates of both variables, using a determinant model based on the theory of planned behavior. Knowledge, advantages, self-efficacy, being female and being more highly educated were associated with passive detection. Knowledge, advantages, moral obligation, anticipated regret, social norm, and self-efficacy were correlated with the intention to seek help. We suggest that educational programs need to address the two variables separately and also need to tailor their content to the various social psychological correlates of these two aspects.

The active plus protocol: systematic development of two theory-and evidence-based tailored physical activity interventions for the over-fifties

BackgroundLimited data are available on the development, implementation and evaluation processes of physical activity promotion programmes among older adults. More integrative insights into interventions describing the planned systematic development, implementation and evaluation are needed.Methods and designThe purpose of this study is to give an integrative insight into the development of the Active plus programme applying the six-step Intervention Mapping protocol. The Active plus programme consisted of two theory- and evidence-based tailored physical activity promotion interventions, both comprising three tailored letters delivered over four months and aimed at raising awareness of insufficient physical activity, and stimulating physical activity initiation and maintenance among the over-fifties.The first intervention, the basic tailored intervention, provided tailored letters that intervened on the psychosocial determinants of physical activity. The second intervention, the intervention plus, provided the same tailored information but additionally provided tailored information about physical activity opportunities in the specific environment in which the older adults lived. This environment-based component also provided access to a forum and e-buddy system on a website. A plan for implementation and evaluation is also described.DiscussionThe planned development of the Active plus programme resulted in two theory- and evidence-based tailored physical activity interventions targeted at the over-fifties.Trial RegistrationDutch Trial Register NTR 920