Flawed meta-analysis of a flawed literature: Commentary on Versteeg et al.

Health Psychology Section, Department of Health Sciences, University Medical Center Groningen, University of Groningen, the Netherlands.
European journal of preventive cardiology 12/2012; 19(6):1381-2. DOI: 10.1177/2047487312437716
Source: PubMed
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    • "Finally, an additional criticism of Type D research is that the majority of studies investigating the influence of Type D on adverse clinical coronary outcomes have been conducted by a single group (Coyne et al., 2011; Smith, 2011). A recent meta-analysis which found support for a relationship between Type D personality and health status in coronary patients (Versteeg, Spek, Pedersen, & Denollet, 2012) was over-represented by studies from Denollet's group, whom also conducted the meta-analysis itself (Coyne & de Voogd, 2012). However, this same criticism cannot be levelled at the body of research which has investigated the relationship between Type D and physiological functioning in healthy individuals, which has been conducted by several different research groups. "
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    ABSTRACT: Abstract Previous research investigating the influence of Type D personality on cardiovascular reactivity to stress in healthy young adults is somewhat mixed. The present study sought to investigate this question using an ecologically valid laboratory stressor. Beat-to-beat blood pressure and heart rate were measured in 77 healthy young adults during exposure to multitasking stress. Mood and background stress were both associated with Type D personality when Type D was conceptualised as a dimensional construct, with less robust findings observed using the traditional dichotomous typological approach. However, the continuous Type D construct added limited predictive value of the self-report measures above that of its constituent components, negative affectivity (NA) and social inhibition (SI). Further, an inverse relationship between the continuous Type D construct and blood pressure reactivity to multitasking stress was observed. In summary, our findings suggest that Type D personality is predictive of blunted cardiovascular reactivity to stress in healthy individuals when Type D is considered as a dimensional construct and the independent influence of NA and SI is controlled for. Further, our findings suggest that Type D does not predict additional variance in mood and background stress above that of NA and SI when these constituent factors are considered independently.
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