The purpose of the study was to examine psychological and methodological
factors which would predict the white coat effect (WCE). The WCE is defined as the
difference (mm Hg) between ambulatory and office measured blood pressure (BP). Sixty
three community volunteers participated in this study. Participants were divided into 3
Response style groups: (1) Office responders had ambulatory BP values which were
lower than office BP, (2) Non responders showed a minimal difference between office
and ambulatory BP, and (3) Home responders had significantly higher ambulatory BP
compared to office BP. Participants were asked to have a series of BP readings taken by
a physician, nurse and by themselves and participate in 24 hour ambulatory monitoring.
State and trait self-report psychological measures were completed.
Self measured BP was the most representative of ambulatory BP for the sample as
a whole, and in particular for the Home responders. State anxiety, previously dismissed
as mediating factor in the expression of the white coat effect, proved to discriminate
between the groups. Office responders had significantly higher levels of state anxiety,
directly related to BP measurements, compared to Home and Non responders.
Habituation to the experience of having BP measured by a physician, and habituation of
the anxiety prior to the BP measurement, was different among the three groups. Trait
psychological variables did not distinguish group membership. Self measured systolic
BP, state anxiety prior to self measured BP, habituation to physician measured BP and
the anxiety preceding it, were entered as predictors variables in a discriminant function
analyses. These variables were able to correctly classify group membership for 63% of
the sample.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/8431 |
| Date | 05 1900 |
| Creators | Newlove, Therese A. |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Relation | UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/] |
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