34 Chapter 2 Table 2. Study characteristics Author, publication year and country Population (dataset, cohort or register, n, sex, and age) Design (type and follow-up period) Statistical analyses (stratification and/or interaction term) Quality assessment score Westerlund et al., 2010 France (43) GAZEL cohort n=14,104 Male 80% Mean age 54.8 (SD 2.7) Prospective Follow-up 14 years Stratification; occupational level Interaction term; exit from work with occupational level 78% Zins et al., 2011 France (44) GAZEL cohort n=12,384 Male 81% Mean age men 55.1 (range 50-63; SD 2.0); Mean age women 54.9 (range 50-61; SD 2.4) Prospective Follow-up 10 years Stratification; occupational level Interaction term; exit from work with occupational level 78% Abbreviations; HRS=Health and Retirement Study; GAZEL cohort=French national gas and electricity company cohort; LASA=Longitudinal Aging Study Amsterdam; MAAS=MAastricht Aging Study; ECHP=European Community Household Panel; EU-SIL=European Union Statistics on Income and Living; DREAM=Danish Register for Evaluation of Marginalization; NPHS=Canadian National Population Heath Survey General health Three studies investigated general health after early/statutory retirement, of which two studies found differences in general health across socioeconomic groups (15, 32). One study described that the probability of obtaining poor general health only decreased among women in higher socioeconomic groups but not among women in lower socioeconomic groups after early/statutory retirement (32). Conversely, one study described that after early/statutory retirement higher socioeconomic groups have a lower probability of obtaining an excellent general health as opposed to lower socioeconomic groups (15). Two studies investigated general health after unemployment or disability pension, but found no differences across socioeconomic groups (39, 41). Physical health Seven studies investigated physical health after early/statutory retirement, of which two studies found differences across socioeconomic groups (33, 40).
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