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Using multilevel path analysis in analyzing 24‐h ambulatory physiological recordings applied to medically unexplained symptoms
Author(s) -
Houtveen Jan H.,
Hamaker Ellen L.,
Van Doornen Lorenz J. P.
Publication year - 2010
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2009.00951.x
Subject(s) - expiration , psychology , vagal tone , ambulatory , mood , heart rate variability , heart rate , autonomic nervous system , path analysis (statistics) , circadian rhythm , rhythm , audiology , cardiology , multilevel model , developmental psychology , medicine , respiratory system , clinical psychology , blood pressure , psychiatry , neuroscience , statistics , mathematics
Abstract A non‐clinical group high on heterogeneous medically unexplained symptoms (MUS; n =97) was compared with healthy controls ( n =66) on the within‐subject relationships between physiological measures using multilevel path analysis. Momentary experienced somatic complaints, mood (tension and depression), cardiac autonomic activity (inter‐beat intervals, pre‐ejection period (PEP), and respiratory sinus arrhythmia (RSA)) and respiration (rate and partial pressure of CO 2 at the end of a normal expiration) were monitored for 24 h using electronic diary and ambulatory devices. Relationships between measures were controlled for diurnal variation and individual means. Only subtle group differences were found in the diurnal rhythm and in the within‐subject relationships between physiological measures. For participants high on MUS, within‐subject changes in bodily symptoms were related to changes in mood, but only marginally to the physiological measures. Results of the current path analysis confirm the subordinate role of cardiac autonomic and respiratory parameters in MUS.