Compliance with Low-Salt Diet and Related Factors in Essential Hypertension Patients

Lee, Soo Jeong; Song, Mi Soon

Abstract

The purpose of this study was to investigate the compliance with low-salt diet in essential hypertension patients, and to identify the related factors of compliance with low-salt diet. The subjects of this study were 177 hypertensive patients who have been followed at Seoul National University Hospital outpatient clinic. The data was collected from August 20, 1998 to September 22, 1998, through survey using a self-report questionnaires and chart review. 24-hour urine sodium excretion was measured for validation of self-reported low-salt diet compliance from 22 patients who agreed for 24-hour urine collection. The questionnaires consist of general characteristics, disease-related characteristics, diet-related characteristics, and 4 scales: (1) Numeric scale (2) Knowledge of low-salt diet (3) Family support for low-salt diet (4) Low-salt diet compliance. The results were as follows: 1) The mean score of low-salt diet compliance was 38.97 +/- 9.26. The mean salt intake converted from 24-hour urine sodium was 16.81g/day, which was much greater than recommendation. The percentage of patients who were taking salt 6-8g/day was only 13.6%, and 8-10g/day was 13.6%. 2) The mean score of knowledge of low-salt diet was 5.12 +/- 1.81. The mean score of family support for low-salt diet was 30.08 +/- 8.81. The patients received emotional, instrumental, evaluative, and informational aspect of family support in sequence of amount. 3) Several factors were found as significant factors which influence low-salt diet compliance. Those were knowledge(p=.015), family support(p=.000), age(p=.039), diastolic pressure(p=.014), previous dietary habit(p= .000), duration of low-salt diet(p=.000), recognition of importance of low-salt diet on hypertension control(p=.000), and recognition of necessity of low-salt diet while antihypertensive drug therapy(p=.030). 4) Four significant predictive factors of low-salt diet compliance were identified: (1) Family support accounted for 24.8% of low-salt diet compliance (2) Previous dietary habit, 14.4% (3) Recognition of importance of low-salt diet on hypertension control, 3.7% (4) Diastolic pressure, 2.1%. Therefore, these factors accounted for 45.0% of low-salt diet compliance. In conclusion, low-salt diet compliance in hypertensive patients was very poor, which call for nursing intervention for enhancing low-salt diet compliance. It is necessary to provide practical knowledge of low-salt diet for hypertensive patients and family members.