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Effect of the presence of an aquarium in the waiting area on the stress, anxiety and mood of adult dental patients: A controlled clinical trial

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Background Interaction with fish is known to reduce stress and anxiety in humans. Objective This trial evaluated the effect of an aquarium present in a geriatric dental clinic waiting-area (WA)… Click to show full abstract

Background Interaction with fish is known to reduce stress and anxiety in humans. Objective This trial evaluated the effect of an aquarium present in a geriatric dental clinic waiting-area (WA) on blood pressure (BP), heart-rate (HR), anxiety, and mood of waiting patients. Methods Participants were recruited into three groups: control (CG): WA without aquarium; partially-stocked aquarium (PSA): aquarium without fish; fully-stocked aquarium (FSA): aquarium with fish. BP and HR of the participants were recorded upon arrival and after 20-minutes of waiting, along with anxiety [State trait anxiety inventory (STAI-6)] and mood [Feeling scale (FS), Felt arousal scale (FAS)] scores. A purpose-built questionnaire evaluated the subjective assessment of the participants’ experience in the WA. ANOVA with repeated measures and nonparametric tests were used for statistical analysis (p<0.05). Results 392 patients (mean age: 65.07±16.9y) completed this trial. There was an effect of time on the BP [systolic: F(1, 120) = 44.82, p<0.001; diastolic: F(1, 120) = 25.10, p<0.001] and HR [F(1, 120) = 40.94, p<0.001]. No effect of groups on BP [systolic: F(1, 120) = 1.01, p = 0.32; diastolic: F(1, 120) = 0.01, p = 0.92] was revealed, but a decrease of HR [F(1, 120) = 21.59, p<0.001]. No effect of time*group on BP [systolic: F(1, 120) = 0.89, p = 0.35; diastolic: F(1, 120) = 0.31, p = 0.58], or HR [F(1, 120) = 1.04, p-0.31]. WA groups had no effects on the participants’ anxiety [H(2) = 2.76, p = 0.25], or mood [FS: H(2) = 2.28, p = 0.32; FAS: H(2) = 1.54, p = 0.46]. Patients rated FSA higher than others [H(2) = 20.98, p<0.001). Conclusions There was no influence of the presence of an aquarium on the patients’ blood pressure, heart rate, anxiety, or mood.

Keywords: trial; anxiety; anxiety mood; effect; aquarium

Journal Title: PLoS ONE
Year Published: 2021

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