Fiona Imlach Gunasekara
Biographic Data
| ID | 1729007 |
|---|---|
| NAME | Fiona Imlach Gunasekara |
| GIVEN NAMES | Fiona Imlach |
| FAMILY NAME | Gunasekara |
| SIGNATURE | GUNASEKARA F I |
| AFFILIATIONS | University of Otago |
| VERIFIED | No |
| TOTAL WORKS | 8 |
| TOTAL CITATIONS | 31 |
| AUTHOR COUNT | 8 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2009 |
| LATEST PUBLICATION YEAR | 2014 |
| H-INDEX | 4 |
Fixed effects analysis of repeated measures data
The analysis of repeated measures or panel data allows control of some of the biases which plague other observational studies, particularly unmeasured confounding. When this bias is suspected, and the research question is: 'Does a change in an exposure cause a change in the outcome?', a fixed effects approach can reduce the impact of confounding by time-invariant factors, such as the unmeasured characteristics of individuals. Epidemiologists fami…
Do changes in socioeconomic factors lead to changes in mental health? Findings from three waves of a population based panel study
BACKGROUND: There has been little investigation of changes in socioeconomic measures and mental health (MH)/illness over time within individuals using methods that control for time-invariant unobserved confounders. We investigate whether changes in multiple socioeconomic measures are associated with self-reported MH using fixed effects methods to control for unobserved time-invariant confounding. METHODS: Data from three waves of a panel study wi…
The impact of in-work tax credit for families on self-rated health in adults: A cohort study of 6900 New Zealanders
BACKGROUND: In-work tax credit (IWTC) for families, a welfare-to-work policy intervention, may impact health status by improving income and employment. Most studies estimate that IWTCs in the USA and the UK have no effect on self-rated health (SRH) and several other health outcomes, but these estimates may be biased by confounding. The current study estimates the impact of one such IWTC intervention (called In-Work Tax Credit) on SRH in adults in…
The relationship between income and health using longitudinal data from New Zealand
BACKGROUND: Evidence for a cross-sectional relationship between income and health is strong but is probably biased by substantial confounding. Longitudinal data with repeated income and health measures on the same individuals can be analysed to control completely for time-invariant confounding, giving a more accurate estimate of the impact of short-term changes in income on health. METHODS: 4 years of annual data (2002--2005) from the New Zealand…
Comparing self-rated health and self-assessed change in health in a longitudinal survey: Which is more valid
Change in income and change in self-rated health: Systematic review of studies using repeated measures to control for confounding bias
P1-409 Differential loss of participants does not necessarily cause selection bias
Background Most research is affected by differential participation, where individuals who do not participate have different characteristics to those who do. This is often assumed to induce selection bias. However, selection bias only occurs if the exposure-outcome association differs for participants compared to non-participants. We empirically demonstrate that selection bias does not necessarily occur when there is varying participation in a stu…
What is the association between wealth and mental health
BACKGROUND: Socioeconomic inequalities in mental health have been shown in a number of populations. This study aims to investigate the association between asset wealth and psychological distress in New Zealand and whether it is independent of other socioeconomic measures and baseline health status. METHODS: Data for this study were from the first three waves of the Survey of Families, Income and Employment (SoFIE) conducted in New Zealand (2002-2…
Comparing self-rated health and self-assessed change in health in a longitudinal survey: Which is more valid
What is the association between wealth and mental health
BACKGROUND: Socioeconomic inequalities in mental health have been shown in a number of populations. This study aims to investigate the association between asset wealth and psychological distress in New Zealand and whether it is independent of other socioeconomic measures and baseline health status. METHODS: Data for this study were from the first three waves of the Survey of Families, Income and Employment (SoFIE) conducted in New Zealand (2002-2…
The relationship between income and health using longitudinal data from New Zealand
BACKGROUND: Evidence for a cross-sectional relationship between income and health is strong but is probably biased by substantial confounding. Longitudinal data with repeated income and health measures on the same individuals can be analysed to control completely for time-invariant confounding, giving a more accurate estimate of the impact of short-term changes in income on health. METHODS: 4 years of annual data (2002--2005) from the New Zealand…
Do changes in socioeconomic factors lead to changes in mental health? Findings from three waves of a population based panel study
BACKGROUND: There has been little investigation of changes in socioeconomic measures and mental health (MH)/illness over time within individuals using methods that control for time-invariant unobserved confounders. We investigate whether changes in multiple socioeconomic measures are associated with self-reported MH using fixed effects methods to control for unobserved time-invariant confounding. METHODS: Data from three waves of a panel study wi…
The impact of in-work tax credit for families on self-rated health in adults: A cohort study of 6900 New Zealanders
BACKGROUND: In-work tax credit (IWTC) for families, a welfare-to-work policy intervention, may impact health status by improving income and employment. Most studies estimate that IWTCs in the USA and the UK have no effect on self-rated health (SRH) and several other health outcomes, but these estimates may be biased by confounding. The current study estimates the impact of one such IWTC intervention (called In-Work Tax Credit) on SRH in adults in…
What is the association between wealth and mental health
BACKGROUND: Socioeconomic inequalities in mental health have been shown in a number of populations. This study aims to investigate the association between asset wealth and psychological distress in New Zealand and whether it is independent of other socioeconomic measures and baseline health status. METHODS: Data for this study were from the first three waves of the Survey of Families, Income and Employment (SoFIE) conducted in New Zealand (2002-2…
Change in income and change in self-rated health: Systematic review of studies using repeated measures to control for confounding bias
P1-409 Differential loss of participants does not necessarily cause selection bias
Background Most research is affected by differential participation, where individuals who do not participate have different characteristics to those who do. This is often assumed to induce selection bias. However, selection bias only occurs if the exposure-outcome association differs for participants compared to non-participants. We empirically demonstrate that selection bias does not necessarily occur when there is varying participation in a stu…
The relationship between income and health using longitudinal data from New Zealand
BACKGROUND: Evidence for a cross-sectional relationship between income and health is strong but is probably biased by substantial confounding. Longitudinal data with repeated income and health measures on the same individuals can be analysed to control completely for time-invariant confounding, giving a more accurate estimate of the impact of short-term changes in income on health. METHODS: 4 years of annual data (2002--2005) from the New Zealand…
Comparing self-rated health and self-assessed change in health in a longitudinal survey: Which is more valid
The impact of in-work tax credit for families on self-rated health in adults: A cohort study of 6900 New Zealanders
BACKGROUND: In-work tax credit (IWTC) for families, a welfare-to-work policy intervention, may impact health status by improving income and employment. Most studies estimate that IWTCs in the USA and the UK have no effect on self-rated health (SRH) and several other health outcomes, but these estimates may be biased by confounding. The current study estimates the impact of one such IWTC intervention (called In-Work Tax Credit) on SRH in adults in…
Fixed effects analysis of repeated measures data
The analysis of repeated measures or panel data allows control of some of the biases which plague other observational studies, particularly unmeasured confounding. When this bias is suspected, and the research question is: 'Does a change in an exposure cause a change in the outcome?', a fixed effects approach can reduce the impact of confounding by time-invariant factors, such as the unmeasured characteristics of individuals. Epidemiologists fami…
Do changes in socioeconomic factors lead to changes in mental health? Findings from three waves of a population based panel study
BACKGROUND: There has been little investigation of changes in socioeconomic measures and mental health (MH)/illness over time within individuals using methods that control for time-invariant unobserved confounders. We investigate whether changes in multiple socioeconomic measures are associated with self-reported MH using fixed effects methods to control for unobserved time-invariant confounding. METHODS: Data from three waves of a panel study wi…
Medicine (7 works) · Demography (6 works) · Environmental health (5 works) · Health disparities and outcomes (5 works) · Confounding (4 works) · Gerontology (4 works) · Psychology (4 works) · Employment and Welfare Studies (3 works) · Gerontology (3 works) · Logistic regression (3 works)