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Adverse events and patients' perceptions of antihypertensive drug effectiveness.

Artikel i vetenskaplig tidskrift
Författare Staffan Svensson
Karin I Kjellgren
Publicerad i Journal of human hypertension
Volym 17
Nummer/häfte 10
Sidor 671-5
ISSN 0950-9240
Publiceringsår 2003
Publicerad vid Institutionen för omvårdnad
Institutionen för invärtesmedicin, Avdelningen för klinisk farmakologi
Sidor 671-5
Språk en
Länkar dx.doi.org/10.1038/sj.jhh.1001596
Ämnesord Adult, Aged, Aged, 80 and over, Antihypertensive Agents, adverse effects, Cross-Sectional Studies, Female, Humans, Hypertension, complications, drug therapy, Male, Middle Aged, Patient Compliance, Perception, Risk Assessment, Treatment Outcome
Ämneskategorier Farmaceutisk vetenskap, Omvårdnad

Sammanfattning

Adverse events that patients attribute to their drug treatment are generally considered to reduce adherence to medication. However, some patients interpret such symptoms as indicating drug effectiveness. If perceivedly effective drugs are more likely to be taken then adverse events may increase adherence. The extent to which patients interpret adverse events as indicating drug effectiveness is not well known. We investigated this in a cross-sectional questionnaire study of 1013 drug-treated hypertensive patients from 55 primary health-care centres and 11 internal medicine clinics in Sweden. We hypothesized that estimates of future risk of complications of hypertension made by hypertensive patients who had adverse events would be lower than estimates made by patients who did not have adverse events, and that these estimates would only differ when patients were estimating their risks in a setting where they continued taking antihypertensive drugs. Patients' risk estimates were measured with visual analogue scales and adverse events were detected by an open question. Contrary to our hypothesis, patients with adverse events (25.7%) gave higher estimates of future risk in the continuing medication setting. This association persisted in a multivariate analysis, where a number of factors related to adverse events and risk were controlled for (OR 1.76 (95% CI, 1.26-2.45), P=0.001 for the most highly correlated risk measure), but risk estimates did not differ between patients with and without adverse events in the setting of not continuing medication. Possible explanations for these findings are pre-existing differences in attitude towards drugs and level of fear of complications.

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