Journal List > Perspect Nurs Sci > v.12(1) > 1060409

Seo, Lim, Hyeon, Kim, and Eom: Factors Influencing Medication Adherence in Hemodialysis Patients: Focusing on Primary and Secondary Medical Care

Abstract

Purpose:

The purpose of this study was to identify the factors influencing medication adherence in hemodialysis patients among primary medical care and secondary medical care. Methods: A cross-sectional survey design was utilized. Data were collected using questionnaires from 280 hemodialysis patients who had taken prescribed medication regularly as a result of chronic renal failure at primary and secondary medical care in Korea. Data were analyzed using t-test, ANOVA, Pearson correlation coefficients, and multiple regression. Results: There were statistically significant differences in medication adherence according to living area (p=.002), health condition (p<.001), amount of medication (p=.004), inconvenience for taking medication (p<.001), and depression level (p=.001). The mean of medication adherence was 3.72 points. Medication adherence was explained by perceived barrier related to medication taking (β=.338), attitude (β=.250), and depression (β=.132). Conclusion: This study strongly recommended that nursing intervention program to improve medication adherence should be developed and a match control study in improvement of medication adherence for hemodialysis patients needs to be done.

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Table 1.
Medication Adherence according to General Characteristics (N=280)
Characteristics Categories n (%) Medication adherence
M±SD t or F p
Gender Male 166 (59.3) 3.71±1.57 0.16 .875
Female 114 (40.7) 3.71±1.56    
Age (year) 20~39 12 (4.3) 2.82±1.81 2.92 .056
40~64 164 (58.6) 3.63±1.45    
≥65 104 (37.1) 3.87±1.51    
Living status Couple 192 (68.6) 3.81±1.46 1.23 .300
Alone 66 (23.6) 3.43±1.61    
Friends or caregiver 22 (7.8) 3.62±1.58    
Living area Metropolisa 91 (32.5) 3.78±1.59 6.27 .002
Local small cityb 64 (22.9) 4.14±1.32   b>a, c
Rural areac 125 (44.6) 3.38±1.53    
Education Illiteracy 32 (11.4) 3.91±1.22 1.40 .234
Elementary school 57 (20.4) 3.34±1.72    
Middle school 52 (18.6) 3.92±1.69    
High school 103 (36.8) 3.71±1.43    
≥University 36 (12.9) 3.80±1.48    
Occupation Yes 39 (13.9) 3.72±1.59 0.14 .888
No 241 (86.1) 3.72±1.58    
Economic status ≥Middle 140 (50.0) 3.81±1.51 1.24 .544
Low 140 (50.0) 3.58±1.55    
Experience of regular medication education program Yes 0 (0.0)      
No 280 (100.0) 3.73±1.52    

Duncan test.

Table 2.
Medication Adherence according to Illness-related Characteristics (N=280)
Characteristics Categories n (%) M±SD t or F p
Period of hemodialysis (year) <1 38 (13.6) 4.18±1.20 2.11 .100
≥1~<3 75 (26.8) 3.81±1.61    
≥3~<5 78 (27.9) 3.73±1.40    
≥5 89 (31.8) 3.54±1.68    
Perceived health status Gooda 44 (15.7) 4.64±1.10 5.09 <.001
Moderateb 120 (42.9) 3.68±1.62 a>b, c  
Badc 113 (40.3) 3.37±1.51    
No respond 3 (1.1)      
No. of chronic illness 1 87 (31.1) 3.51±1.60 2.46 .087
2 121 (43.2) 3.59±1.61    
≥3 71 (25.4) 4.03±1.32    
No respond 1 (0.4)      
Frequency of medication administration 1~2 93 (33.2) 3.87±1.53 0.89 .414
3 154 (55.0) 3.63±1.60    
4 30 (10.7) 3.55±1.57    
No respond 3 (1.1)      
Amount of medication (tablets/day) <5a 26 (9.3) 4.04±1.39 1.89 .004
6~10b 88 (31.4) 3.91±1.40 a>c
≥11c 165 (58.9) 3.58±1.59    
No respond 1 (0.4)      
Assistance available for medication administration Unavailable 188 (67.1) 3.61±1.58 0.28 .830
Spouse 62 (22.1) 3.87±1.40    
Offspring 15 (5.4) 3.71±1.32    
Friends or caregiver 14 (5.0) 3.71±1.58    
No respond 1 (0.4)      
Inconvenience for taking medication Yes 160 (57.1) 3.38±1.56 -3.71 <.001
No 116 (41.4) 4.12±1.33    
No respond 4 (1.4)      
Depression level Normala 67 (23.9) 4.12±1.31 5.75 .001
Milda 47 (16.8) 4.11±1.29 a>b, c  
Moderateb 56 (20.0) 3.57±1.59    
Severec 105 (37.5) 3.28±1.58    
No respond 5 (1.8)      

Duncan test.

Table 3.
Medication Adherence & Factors related to Medication Taking (N=280)
Variables Items M±SD Minimum Maximum
Medication adherence 3.72±1.52 0 6
Factors related to medication taking 62.54±3.22    
Attitude ․ Believed that it is important to take all of the pills my doctor prescribed for my health 8.27±2.45 1 10
․ Believed that it is important to take my pills in time 7.85±2.75 1 10
․ Believed that it is okay to skip my pills when I am feeling better∗ 6.86±3.47 1 10
․ Understand why I need to take pills prescribed for me 7.42±2.93 1 10
Subtotal (40) 30.40±3.19    
Knowledge ․ Know all the names of pills that I take everyday 4.09±3.27 0 10
․ Know the dose of each pill that I take everyday 4.70±3.87 0 10
․ Know the side effects of the pills that I take everyday 3.66±3.53 0 10
Subtotal (30) 12.45±3.65    
Perceived barrier ․ Forgetting the time of medication 2.82±3.02 0 10
․ Confusing the medication times 2.07±2.73 0 10
․ Cost of medication 1.37±2.38 0 10
․ Belief that I'll be fine even though I skip one dose of medication 2.00±2.80 0 10
․ Not carrying my medication when I am out 2.11±2.80 0 10
․ Amount of pills that I need to take a day 1.87±2.58 0 10
․ The frequency of my medication schedule 1.49±2.24 0 10
․ Having no support from my family or somebody for eminding me 1.43±2.35 0 10
to take my medication      
․ Belief that my symptoms are better 1.53±2.48 0 10
․ Not trusting the efficacy of medications in my disease 1.49±2.24 0 10
․ Belief that my symptoms are the same even though I skip the 1.36±2.24 0 10
medication      
Subtotal (110) 19.79±2.53    
Table 4.
Factors Influencing Medication Adherence (N=280)
Factors B SE β t (p)
(Constant) 3.11 0.42   7.41 (<.001)
Attitude 0.19 0.04 .25 4.34 (<.001)
Perceived barrier -0.27 0.05 -.34 -5.79 (<.001)
Depression -0.02 0.01 -.13 -2.49 (.013)
Adjusted R2=.31, F=31.00, p<.001

SE=Standard errors;

Unstanardized coefficients.

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