Frans E. S. Tan

The Impact of Characteristics of Cigarette Smoking on Urinary Tract Cancer Risk A Meta-Analysis of Epidemiologic Studies

Although narrative reviews have concluded that there is strong support for an association between cigarette smoking and urinary tract cancer, the association has never been quantified systematically in reviews. The purpose of this systematic review was to summarize and quantify the impact of different smoking characteristics (status, amount, duration, cessation, and age at first exposure) both unadjusted and adjusted for age and gender.

The Competing Demands of Paid Work and Parent Care Middle-Aged Daughters Providing Assistance to Elderly Parents

This article investigates the potentially competitive relationship between paid work and parent care provided by daughters and daughters-in-law. In line with the scarcity hypothesis of role theory, four subhypotheses were formulated and tested empirically. In a population-based probability sample of middle-aged women (n = 581), only partial empirical support was found for the scarcity or role conflict hypothesis. It appeared that employment significantly reduces the chances of becoming a caregiver. However, parent care and employment are not conflicting in time as the amount of care provided to parents was not affected by out-of-home employment. Parent care has only a small impact on work decisions, and employed caregivers do not experience more caregiver role strain. It was hypothesized that employed women not yet providing care anticipate a role conflict when a parent becomes frail and needs help. Consequently, a self-selection process takes place whereby the nearest living daughter with the least competing demands is most likely to accept the caregiver role. Once the caregiver role is accepted, both role strain and the time spent on parent care are determined by factors other than employment status or work hours.

Quality of Life After Self-Management Cancer Rehabilitation: A Randomized Controlled Trial Comparing Physical and Cognitive-Behavioral Training Versus Physical Training

Objective: To conduct a randomized controlled trial and compare the effects on cancer survivors’ quality of life in a 12-week group-based multidisciplinary self-management rehabilitation program, combining physical training (twice weekly) and cognitive-behavioral training (once weekly) with those of a 12-week group-based physical training (twice weekly). In addition, both interventions were compared with no intervention. Methods: Participants (all cancer types, medical treatment completed ≥3 months ago) were randomly assigned to multidisciplinary rehabilitation (n = 76) or physical training (n = 71). The nonintervention comparison group consisted of 62 patients on a waiting list. Quality of life was measured using the RAND-36. The rehabilitation groups were measured at baseline, after rehabilitation, and 3-month follow-up, and the nonintervention group was measured at baseline and 12 weeks later. Results: The effects of multidisciplinary rehabilitation did not outperform those of physical training in role limitations due to emotional problem (primary outcome) or any other domains of quality of life (all p > .05). Compared with no intervention, participants in both rehabilitation groups showed significant and clinically relevant improvements in role limitations due to physical problem (primary outcome; effect size (ES) = 0.66), and in physical functioning (ES = 0.48), vitality (ES = 0.54), and health change (ES = 0.76) (all p < .01). Conclusions: Adding a cognitive-behavioral training to group-based self-management physical training did not have additional beneficial effects on cancer survivors’ quality of life. Compared with the nonintervention group, the group-based self-management rehabilitation improved cancer survivors’ quality of life. PT = physical training; CBT = cognitive-behavioral training; PT+CBT = physical training plus cognitive-behavioral training; WLC = waiting-list comparison; QoL = quality of life; ANOVA = analysis of variance; ES = effect size.

Instruments to Assess Sarcopenia and Physical Frailty in Older People Living in a Community (Care) Setting: Similarities and Discrepancies

OBJECTIVES Both sarcopenia and physical frailty are geriatric syndromes causing loss of functionality and independence. This study explored the association between sarcopenia and physical frailty and the overlap of their criteria in older people living in different community (care) settings. Moreover, it investigated the concurrent validity of the FRAIL scale to assess physical frailty, by comparison with the widely used Fried criteria. DESIGN Data were retrieved from the cross-sectional Maastricht Sarcopenia Study (MaSS). SETTING The study was undertaken in different community care settings in an urban area (Maastricht) in the south of the Netherlands. PARTICIPANTS Participants were 65 years or older, gave written informed consent, were able to understand Dutch language, and were not wheelchair bound or bedridden. INTERVENTION Not applicable. MEASUREMENTS Sarcopenia was identified using the algorithm of the European Working Group on Sarcopenia in Older People. Physical frailty was assessed by the Fried criteria and by the FRAIL scale. Logistic regression was performed to assess the association between sarcopenia and physical frailty measured by the Fried criteria. Spearman correlation was performed to assess the concurrent validity of the FRAIL scale compared with the Fried criteria. RESULTS Data from 227 participants, mean age 74.9 years, were analyzed. Sarcopenia was identified in 23.3% of the participants, when using the cutoff levels for moderate sarcopenia. Physical frailty was identified in 8.4% (≥3 Fried criteria) and 9.3% (≥3 FRAIL scale criteria) of the study population. Sarcopenia and physical frailty were significantly associated (P = .022). Frail older people were more likely to be sarcopenic than those who were not frail. In older people who were not frail, the risk of having sarcopenia increased with age. Next to poor grip strength (78.9%) and slow gait speed (89.5%), poor performance in other functional tests was common in frail older people. The 2 physical frailty scales were significantly correlated (r = 0.617, P < .001). CONCLUSION Sarcopenia and physical frailty were associated and partly overlap, especially on parameters of impaired physical function. Some evidence for concurrent validity between the FRAIL scale and Fried criteria was found. Future research should elicit the value of combining sarcopenia and frailty measures in preventing disability and other negative health outcomes.

The association between white matter hyperintensities and executive decline in mild cognitive impairment is network dependent

White matter hyperintensities (WMH) in Mild Cognitive Impairment (MCI) have been associated with impaired executive functioning, although contradictory findings have been reported. The aim of this study was to examine whether WMH location influenced the relation between WMH and executive functioning in MCI participants (55-90 years) in the European multicenter memory-clinic-based DESCRIPA study, who underwent MRI scanning at baseline (N = 337). Linear mixed model analysis was performed to test the association between WMH damage in three networks (frontal-parietal, frontal-subcortical and frontal-parietal-subcortical network) and change in executive functioning over a 3-year period. WMH in the frontal-parietal and in the frontal-parietal-subcortical network were associated with decline in executive functioning. However, the frontal-subcortical network was not associated with change in executive functioning. Our results suggest that parietal WMH are a significant contributor to executive decline in MCI and that investigation of WMH in the cerebral networks supporting cognitive functions provide a new way to differentiate stable from cognitive declining MCI individuals.

Optimal allocation of time points for the random effects model

In this article the problem of the optimal selection and allocation of time points in repeated measures experiments is considered. D‐ optimal designs for linear regression models with a random intercept and first order auto‐regressive serial correlations are computed numerically and compared with designs having equally spaced time points. When the order of the polynomial is known and the serial correlations are not too small, the comparison shows that for any fixed number of repeated measures, a design with equally spaced time points is almost as efficient as the D‐ optimal design. When, however, there is no prior knowledge about the order of the underlying polynomial, the best choice in terms of efficiency is a D‐ optimal design for the highest possible relevant order of the polynomial. A design with equally‐spaced time points is the second best choice

Daily (In)Activities of Nursing Home Residents in Their Wards: An Observation Study

OBJECTIVES Research shows that nursing home residents are largely inactive. This inactivity negatively influences physical fitness, and participation in daily activities is known to have a positive influence on physical function and quality of life. Existing research does not provide sufficient insight into the daily activities in which nursing home residents participate. This insight is needed to develop future interventions so as to encourage nursing home residents to participate in daily activities and, thereby, decrease inactivity. The purpose of this study was to obtain insight into daily (in)activities of psychogeriatric and somatic nursing home residents during the day and their body positions during these (in)activities. DESIGN Cross-sectional observation study. SETTING Nursing homes in the Netherlands (19 psychogeriatric and 11 somatic wards). PARTICIPANTS Participants were 723 home residents in 7 nursing homes. MEASUREMENTS Observations were conducted using a self-developed observation list. Residents were observed in their wards during 5 random observation times between 7:00 am and 11:00 pm, in which the daily activity and position of the resident during this activity were scored. Percentages of activities and positions were calculated for each observation time. RESULTS In total, 3282 observations (91% of the intended 3615 observations) were conducted. Nursing home residents of both psychogeriatric and somatic wards were mainly observed partaking in in activities, such as sleeping, doing nothing, and watching TV (range: 45%-77% of the 5 observation times). Furthermore, residents were engaged in activities of daily living (ADLs) (range: 15%-38%) that mainly comprised activities related to mobility (range: 10%-19%) and eating and drinking (range: 2%-17%). Engagement of residents in instrumental ADLs (IADLs) was rarely observed (up to 3%). Residents were largely observed in a lying or sitting position (range: 89%-92%). CONCLUSION Most of the psychogeriatric and somatic nursing home residents spend their day inactive in a lying or sitting position in the ward. To encourage nursing home residents in daily activities in the wards, interventions are needed that (1) focus on increasing ADLs and IADLs, and (2) encourage standing and walking.

Maximin D-optimal designs for binary longitudinal responses

Optimal design problems for logistic mixed effects models for binary longitudinal responses are considered. A function of the approximate information matrix under the framework of the Penalized Quasi Likelihood (PQL) and a generalized linear mixed model with autocorrelation is optimized. Locally D-optimal designs are computed. Maximin D-optimal designs are considered to overcome the problem of parameter value dependency of the D-optimal designs. The results show that the optimal number of repeated measurements depends on the number of regression parameters in the model. The performance of the maximin D-optimal designs in terms of the maximin efficiency (MME) is high for a range of parameter values that is common in practice. The design locations for mixed-effects logistic models generally shift to the left as compared to the design locations for general linear mixed-effects models known in the literature.

The effect of multimorbidity on health related functioning: Temporary or persistent? Results from a longitudinal cohort study

OBJECTIVE Multimorbidity is known for its negative effects on health related functioning. It remains unclear if these effects are stable over time. The aim was to investigate if the relation between single morbidity/multimorbidity and health related functioning is temporary or persistent. METHODS Data were collected as part of the Maastricht Aging Study (MAAS), a prospective study into the determinants of cognitive aging. Participants (n=1184), 24-81 years old, were recruited from a patient database in primary care (Registration Network Family Practices). Morbidity status (i.e. healthy, single morbidity or multimorbidity) and the Short Form Health Survey (SF-36) were both assessed at baseline, at 3- and 6-year follow-up. RESULTS At baseline but not at 3- and 6-year follow-up, participants with single morbidity reported poorer physical functioning than their healthy counterparts. Multimorbidity was associated with poorer physical functioning at all measurements. Participants with multimorbidity showed a steep decrease in physical functioning between 3- and 6-year follow-up. Multimorbidity appeared to be unrelated to mental functioning. At baseline and at 3-year follow-up, participants who had a change in morbidity status reported poorer physical functioning than their healthy counterparts. CONCLUSIONS Poorer physical functioning that accompanies multimorbidity is persistent and may even increase over time. People, who acquire one or more diseases during the 3-year follow-up, already showed poorer physical functioning at baseline compared to people who remained healthy during these years. Post-hoc analyses, using the SCL-90 as an outcome measure, did show that multimorbidity was related to depressive and anxiety complaints. However, these complaints seem to decline over time.

Circulating cardiac troponin T exhibits a diurnal rhythm.

OBJECTIVES The goal of this study was to test the unverified assumption that chronically elevated cardiac troponin T (cTnT) levels fluctuate randomly around a homeostatic set point. BACKGROUND The introduction of high-sensitivity cardiac troponin (cTn) assays has improved sensitivity for acute myocardial infarction (AMI). However, many patients with a single positive cTn test result do not have AMI. Therefore, the diagnosis of AMI relies strongly on serial testing and interpretation of cTn kinetics. Essential in this regard is a profound understanding of the biological variation of cTn. METHODS Two studies were conducted to assess biological cTnT variation and to investigate the presence of a diurnal rhythm of cTnT. Study 1 comprised 23 male subjects with type 2 diabetes, with no acute cardiovascular disease. Serial venous blood samples were drawn over an 11-h period (8:30 am to 7:30 pm). In study 2, the presence of a diurnal cTnT rhythm was investigated by hourly sampling of 7 subjects from study 1 over 25 h. RESULTS In study 1, we observed a gradual decrease in cTnT concentrations during the day (24 ± 2%). This decrease was present in all participants and was most prominent in subjects with the highest baseline cTnT values (Pearsons R 0.93). Diurnal variation of cTnT, as assessed in study 2, was characterized by peak concentrations during morning hours (8:30 am, 17.1 ± 2.9 ng/l), gradually decreasing values during daytime (8:30 pm, 11.9 ± 1.6 ng/l), and rising concentrations during nighttime (8:30 am the next day, 16.9 ± 2.8 ng/l). CONCLUSIONS A diurnal cTnT rhythm substantiates the recommendation that all dynamic changes in cTnT should be interpreted in relation to the clinical presentation. Epidemiological studies and risk-stratification protocols with the use of cTnT may benefit from standardized sampling times. (Exercise and Glycemic Control in Type 2 Diabetes; NCT00945165).