S Berg
Dados Biográficos
| ID | 5599804 |
|---|---|
| NOME | S Berg |
| PRENOMES | S |
| SOBRENOME | Berg |
| ASSINATURA | BERG S |
| AFILIAÇÕES | Pennsylvania State University |
| ORCID | 0000-0002-4722-1973 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 13 |
| TOTAL DE CITAÇÕES | 45 |
| TOTAL COMO AUTOR | 13 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1988 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2019 |
| ÍNDICE H | 5 |
Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS
This work summarizes the methodical capabilities, improvements, and new developments in the radiocarbon laboratory of the accelerator mass spectrometry (AMS) facility at the University of Cologne, Germany, which was established in 2010. During the past years, the laboratory has specialized in the analysis of small and gaseous samples. We thus, recently installed a second ion source dedicated for radiocarbon ( 14 C) analysis of CO 2 samples at our…
Quantitative studies of water and sanitation utilities
This paper performs a literature update of quantitative studies of water and sanitation services (WSS), with an emphasis on tracking the benchmarking literature. There are 190 studies which use cost or production functions to evaluate the performance of WSS utilities. The studies examine: (1) the scale, scope or density economies of utilities in a particular country or region; (2) the influence of ownership on efficiency; (3) the existence and po…
Effects of Repeated Testing in a Longitudinal Age-Homogeneous Study of Cognitive Aging
Estimates of gains related to repeated test exposure (retest effects) and within-person cognitive changes are confounded in most longitudinal studies because of the nonindependent time structures underlying both processes. Recently developed statistical approaches rely on between-person age differences to estimate effects of repeated testing. This study, however, demonstrates how retest effects can be evaluated at the group level in an age-homoge…
Satisfaction With Present Life Predicts Survival in Octogenarians
We examined the effect of life satisfaction on survival over 10 years among 80-year-old and older same-sex twins of whom 320 individuals responded to the Life Satisfaction Index Z questionnaire in connection with the OCTO-Twin study. We treated participants as individuals in semiparametric Cox regression mixed-effects models (frailty) by adjusting the similarity of mortality risk within twin pairs by modeling it as a random variable. An explorato…
Sex Differences After All Those Years? Heritability of Cognitive Abilities in Old Age
We investigated sex differences in genetic and environmental effects on cognitive abilities among older adult twins. We drew participants from the Swedish Twin Registry; our sample included 647 twin pairs. Our cognitive measures included Synonyms, Block Design, Digit Span, Thurstone's Picture Memory, Symbol Digit, and general cognitive ability tests. Higher age was related to lower performance in all cognitive measures, except synonyms. For digit…
Gender and Health
Important gender differences and similarities in health were found using an unlike-sex twin design that reduced variability due to background characteristics. This design also minimized problems caused by gender differences in survival. Research on gender and health in older persons requires more detailed approaches to address the complexity of this topic
Terminal Decline and Markers of Cerebro- and Cardiovascular Disease
The purpose of this study was to examine the cognition-survival relationship among nondemented individuals in late life. The longitudinal design included three examinations at 2-year intervals. At baseline, 466 individuals (age range = 80-98) were examined. During the 6 years of follow-up, 206 individuals died. Four survival groups were defined on the basis of mortality prior to the subsequent measurement occasion. Tests of cognitive functioning …
Education and the Risk of Alzheimer's Disease
The association between dementia and education was studied in 143 twin pairs discordant for dementia, using a matched-pair design, and in 221 dementia cases and 442 unrelated controls from the same twin registry, using a case-control design. Low education was defined as 6 years or less of schooling. Case-control analyses with prevalent cases showed low education to be a risk for Alzheimer's disease but not dementia in general. Low education did n…
Deficits in Controlled Processing May Predict Dementia
This study tested for differential patterns of cognitive decline in 33 twin pairs for which both were nondemented, but 1 member of the pair went on to develop dementia. Compared with their nondemented twin partners, twins who later developed dementia already showed poorer performance on tests of memory and attention, visuospatial-reasoning skills, and perceptual speed and the Mini-Mental State Examination (MMSE). The authors suggest that this clu…
Symptoms of Depression in the Oldest Old
This study examined depressive symptoms in a population-based, longitudinal sample of people aged 80 and older to determine initial prevalence of depressive symptoms and changes over time. Depressive symptomatology was assessed with the Center for Epidemiologic Studies-Depression scale (CES-D). The sample was drawn from the OCTO-Twin study, which examined 702 Swedish twins over age 80 in which both members of the pair were still surviving. For th…
Modelling blood pressure as a continuous outcome variable in a co-twin control study
The co-twin control study is a popular research design that is used in many research disciplines, including epidemiology, medicine, and the behavioural sciences. In co-twin control studies of monozygotic (MZ) exposure discordant twin pairs, the appropriate statistical tests used to analyse data from continuous outcome variables are the parametric paired sample t test or the non-parametric Wilcoxon signed rank test. Results from these tests enable…
A Co-twin--Control Study of Response to Widowhood
The effects of long-term and recent conjugal bereavement were investigated in a sample of 2,104 Swedish twins followed between 1984 and 1993. In co-twin-control analyses, the bereaved twin experienced significantly more depressive symptoms, more loneliness, and less life satisfaction than the married co-twin. This association existed for recently widowed ( 5 years) reported more loneliness than married individuals, and for women there was also a …
Institutional and Home-Based Long-Term Care Alternatives
Institutional and home-based long-term care alternatives : The 1965-1985 Swedish experience
Gender and Health
Important gender differences and similarities in health were found using an unlike-sex twin design that reduced variability due to background characteristics. This design also minimized problems caused by gender differences in survival. Research on gender and health in older persons requires more detailed approaches to address the complexity of this topic
A Co-twin--Control Study of Response to Widowhood
The effects of long-term and recent conjugal bereavement were investigated in a sample of 2,104 Swedish twins followed between 1984 and 1993. In co-twin-control analyses, the bereaved twin experienced significantly more depressive symptoms, more loneliness, and less life satisfaction than the married co-twin. This association existed for recently widowed ( 5 years) reported more loneliness than married individuals, and for women there was also a …
Education and the Risk of Alzheimer's Disease
The association between dementia and education was studied in 143 twin pairs discordant for dementia, using a matched-pair design, and in 221 dementia cases and 442 unrelated controls from the same twin registry, using a case-control design. Low education was defined as 6 years or less of schooling. Case-control analyses with prevalent cases showed low education to be a risk for Alzheimer's disease but not dementia in general. Low education did n…
Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS
This work summarizes the methodical capabilities, improvements, and new developments in the radiocarbon laboratory of the accelerator mass spectrometry (AMS) facility at the University of Cologne, Germany, which was established in 2010. During the past years, the laboratory has specialized in the analysis of small and gaseous samples. We thus, recently installed a second ion source dedicated for radiocarbon ( 14 C) analysis of CO 2 samples at our…
Satisfaction With Present Life Predicts Survival in Octogenarians
We examined the effect of life satisfaction on survival over 10 years among 80-year-old and older same-sex twins of whom 320 individuals responded to the Life Satisfaction Index Z questionnaire in connection with the OCTO-Twin study. We treated participants as individuals in semiparametric Cox regression mixed-effects models (frailty) by adjusting the similarity of mortality risk within twin pairs by modeling it as a random variable. An explorato…
Terminal Decline and Markers of Cerebro- and Cardiovascular Disease
The purpose of this study was to examine the cognition-survival relationship among nondemented individuals in late life. The longitudinal design included three examinations at 2-year intervals. At baseline, 466 individuals (age range = 80-98) were examined. During the 6 years of follow-up, 206 individuals died. Four survival groups were defined on the basis of mortality prior to the subsequent measurement occasion. Tests of cognitive functioning …
Effects of Repeated Testing in a Longitudinal Age-Homogeneous Study of Cognitive Aging
Estimates of gains related to repeated test exposure (retest effects) and within-person cognitive changes are confounded in most longitudinal studies because of the nonindependent time structures underlying both processes. Recently developed statistical approaches rely on between-person age differences to estimate effects of repeated testing. This study, however, demonstrates how retest effects can be evaluated at the group level in an age-homoge…
Deficits in Controlled Processing May Predict Dementia
This study tested for differential patterns of cognitive decline in 33 twin pairs for which both were nondemented, but 1 member of the pair went on to develop dementia. Compared with their nondemented twin partners, twins who later developed dementia already showed poorer performance on tests of memory and attention, visuospatial-reasoning skills, and perceptual speed and the Mini-Mental State Examination (MMSE). The authors suggest that this clu…
Symptoms of Depression in the Oldest Old
This study examined depressive symptoms in a population-based, longitudinal sample of people aged 80 and older to determine initial prevalence of depressive symptoms and changes over time. Depressive symptomatology was assessed with the Center for Epidemiologic Studies-Depression scale (CES-D). The sample was drawn from the OCTO-Twin study, which examined 702 Swedish twins over age 80 in which both members of the pair were still surviving. For th…
Institutional and Home-Based Long-Term Care Alternatives
Institutional and home-based long-term care alternatives : The 1965-1985 Swedish experience
A Co-twin--Control Study of Response to Widowhood
The effects of long-term and recent conjugal bereavement were investigated in a sample of 2,104 Swedish twins followed between 1984 and 1993. In co-twin-control analyses, the bereaved twin experienced significantly more depressive symptoms, more loneliness, and less life satisfaction than the married co-twin. This association existed for recently widowed ( 5 years) reported more loneliness than married individuals, and for women there was also a …
Education and the Risk of Alzheimer's Disease
The association between dementia and education was studied in 143 twin pairs discordant for dementia, using a matched-pair design, and in 221 dementia cases and 442 unrelated controls from the same twin registry, using a case-control design. Low education was defined as 6 years or less of schooling. Case-control analyses with prevalent cases showed low education to be a risk for Alzheimer's disease but not dementia in general. Low education did n…
Deficits in Controlled Processing May Predict Dementia
This study tested for differential patterns of cognitive decline in 33 twin pairs for which both were nondemented, but 1 member of the pair went on to develop dementia. Compared with their nondemented twin partners, twins who later developed dementia already showed poorer performance on tests of memory and attention, visuospatial-reasoning skills, and perceptual speed and the Mini-Mental State Examination (MMSE). The authors suggest that this clu…
Symptoms of Depression in the Oldest Old
This study examined depressive symptoms in a population-based, longitudinal sample of people aged 80 and older to determine initial prevalence of depressive symptoms and changes over time. Depressive symptomatology was assessed with the Center for Epidemiologic Studies-Depression scale (CES-D). The sample was drawn from the OCTO-Twin study, which examined 702 Swedish twins over age 80 in which both members of the pair were still surviving. For th…
Modelling blood pressure as a continuous outcome variable in a co-twin control study
The co-twin control study is a popular research design that is used in many research disciplines, including epidemiology, medicine, and the behavioural sciences. In co-twin control studies of monozygotic (MZ) exposure discordant twin pairs, the appropriate statistical tests used to analyse data from continuous outcome variables are the parametric paired sample t test or the non-parametric Wilcoxon signed rank test. Results from these tests enable…
Gender and Health
Important gender differences and similarities in health were found using an unlike-sex twin design that reduced variability due to background characteristics. This design also minimized problems caused by gender differences in survival. Research on gender and health in older persons requires more detailed approaches to address the complexity of this topic
Terminal Decline and Markers of Cerebro- and Cardiovascular Disease
The purpose of this study was to examine the cognition-survival relationship among nondemented individuals in late life. The longitudinal design included three examinations at 2-year intervals. At baseline, 466 individuals (age range = 80-98) were examined. During the 6 years of follow-up, 206 individuals died. Four survival groups were defined on the basis of mortality prior to the subsequent measurement occasion. Tests of cognitive functioning …
Effects of Repeated Testing in a Longitudinal Age-Homogeneous Study of Cognitive Aging
Estimates of gains related to repeated test exposure (retest effects) and within-person cognitive changes are confounded in most longitudinal studies because of the nonindependent time structures underlying both processes. Recently developed statistical approaches rely on between-person age differences to estimate effects of repeated testing. This study, however, demonstrates how retest effects can be evaluated at the group level in an age-homoge…
Satisfaction With Present Life Predicts Survival in Octogenarians
We examined the effect of life satisfaction on survival over 10 years among 80-year-old and older same-sex twins of whom 320 individuals responded to the Life Satisfaction Index Z questionnaire in connection with the OCTO-Twin study. We treated participants as individuals in semiparametric Cox regression mixed-effects models (frailty) by adjusting the similarity of mortality risk within twin pairs by modeling it as a random variable. An explorato…
Sex Differences After All Those Years? Heritability of Cognitive Abilities in Old Age
We investigated sex differences in genetic and environmental effects on cognitive abilities among older adult twins. We drew participants from the Swedish Twin Registry; our sample included 647 twin pairs. Our cognitive measures included Synonyms, Block Design, Digit Span, Thurstone's Picture Memory, Symbol Digit, and general cognitive ability tests. Higher age was related to lower performance in all cognitive measures, except synonyms. For digit…
Quantitative studies of water and sanitation utilities
This paper performs a literature update of quantitative studies of water and sanitation services (WSS), with an emphasis on tracking the benchmarking literature. There are 190 studies which use cost or production functions to evaluate the performance of WSS utilities. The studies examine: (1) the scale, scope or density economies of utilities in a particular country or region; (2) the influence of ownership on efficiency; (3) the existence and po…
Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS
This work summarizes the methodical capabilities, improvements, and new developments in the radiocarbon laboratory of the accelerator mass spectrometry (AMS) facility at the University of Cologne, Germany, which was established in 2010. During the past years, the laboratory has specialized in the analysis of small and gaseous samples. We thus, recently installed a second ion source dedicated for radiocarbon ( 14 C) analysis of CO 2 samples at our…
Psychology (10 obras) · Medicine (9 obras) · Developmental psychology (6 obras) · Internal Medicine (6 obras) · Demography (5 obras) · Gerontology (5 obras) · Psychiatry (5 obras) · Biology (4 obras) · Cognition (4 obras) · Dementia (4 obras)