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Predicting fluid adherence in hemodialysis patients via the Illness Perception Questionnaire -Revised

PREDICTING FLUID ADHERENCE IN HEMODIALYSIS PATIENTS VIA THE ILLNESS PERCEPTION QUESTIONNAIRE REVISED by Tava L. Arnold The Illness Perception Questionnaire – Revised (IPQ – R; Moss-Morris, Weinman, Petrie, Horne, Cameron, & Buick, 2002) was utilized in the current research to better understand and predict fluid adherence in hemodialysis patients. A sample of patients was recruited from three hemodialysis centers in the Los Angeles area and 116 participants completed the Illness Perception Questionnaire – Revised. The Illness Perception Questionnaire – Revised (Moss-Morris, Weinman, Petrie, Horne, Cameron, & Buick, 2002), is based on the common sense model (CSM) of self regulation by Leventhal (1984). Fluid adherence was measured by the Interdialytic Weight Gain (IWG). IWG is determined by subtracting the postdialytic weight for the previous session from the predialytic weight for the current session. To obtain a more representative indicator of adherence over time the mean IWG was calculated over a 12 session period (approximately 4 weeks). Patients with a mean IWG weights over 2.5 Kg were considered non-adherent to fluid restrictions. In addition, a self-report demographic information questionnaire was administered. Block logistic regression demonstrated that non adherence to fluid restrictions accounted for 65% of the prediction equation and gender was the only identified variable as being a significant predictor of fluid adherence in this hemodialysis patient population. The results of this study suggested that patient illness perceptions as measured by the Illness Perception Questionnaire did not predict adherence to fluid restrictions. However, in this sample, women were significantly more likely to adhere to fluid restrictions than men. Possible modifications for future research, including a subjective measure of adherence as well as the objective measure are evaluated and discussed. PREDICTING FLUID ADHERENCE IN HEMODIALYSIS PATIENTS VIA THE ILLNESS PERCEPTION QUESTIONNAIRE REVISED by Tava L. Arnold, M.A.