Outcomes of an Advanced Practice Nurse led Continuing Care Program in People With Heart Failure
1 Introduction
Congestive heart failure (CHF) has been an increasing global public health problem and is associated with higher expenditure rate and increased hospital admission as well as mortality.[1] According to a report from the American Heart Association: Heart Disease and Stroke Statistics-2018 Update, CHF affects approximately 6.5 million citizens, with an estimated total number of 1 million new cases diagnosed annually[2] and an estimated cost of $31 billion per year.[3] Also, there is a 2% prevalence of heart failure in the general population and over 10% of those cases are patients aged above 70 years.[4]
Today, even if we have improved our health care system and treatment modalities, prognosis for heart failure still remains poor. For example, in the Greece-based heart failure pandemic, representing the clinical and economic burden of heart failure in Greece, the authors demonstrated that despite progress in the management of this chronic disease, about 25% of the patients die during hospitalization, and over 40% are rehospitalized within a period of 1 year.[5] In addition, mortality rate after discharge from the hospital has reached up to 15% and the rate of readmission has reached approximately 20% to 30% within the first month postdischarge.[6] It is now high time to improve the organization of care to provide cost-effective high quality care.
The European Society of Cardiology guidelines recommend the implementation of nurse-led heart failure programs to achieve optimal management of CHF.[7] Even though these programs have shown to reduce readmission, to decrease mortality and to improve the quality of life[8,9] of patients with CHF, it was not easy to implement them in developed countries.
Nurse-led interventions (NLI), carried out by specialized nurses involved giving additional advices, and cares to improve the quality of life of these patients with CHF. To be more precise, nurses provide education on self-care, and they independently perform physical examination as well as assess mental well-being in these patients with CHF.[10] Psychosocial support is also provided by the nurses to the patients and to their families. These nurses also work in close proximity to physicians who can assess and make reasonable and correct decisions about further treatment and management of these patients.
In this analysis, we aimed to systematically show the impact of NLI on readmission and mortality in patients with CHF (with reduced ejection fraction).
2 Methods
2.1 Data sources and search strategies
Publications reporting the impact of NLI on readmission and mortality in patients with CHF were carefully searched from the following electronic databases:
- 1. MEDLINE;
- 2. EMBASE;
- 3. Web of Science;
- 4. Cochrane central;
- 5. http://www.ClinicalTrials.gov;
- 6. Google scholar;
- 7. Reference lists of suitable publications.
Only English publications were retrieved for this analysis.
2.2 Inclusion and exclusion criteria
Inclusion criteria were as followed:
- (a) Only randomized trials based on NLI;
- (b) Studies reporting mortality and readmission as their endpoints;
- (c) Studies involving participants with CHF;
- (d) Studies which were published in English language.
Exclusion criteria were as followed:
- (a) Nonrandomized controlled trials, case studies and literature reviews as well as systematic reviews and meta-analyses;
- (b) Studies which were not based on NLI;
- (c) Studies which did not report mortality or rehospitalization as their endpoints;
- (d) Non-English publications;
- (e) Duplicated studies.
2.3 Outcomes and follow-up
Table 1 shows the types of interventions which were reported, as well as the outcomes and follow-up time periods reported in the original studies.
Table 1 - Outcomes and follow-up.
Studies | Type of nurse intervention | Outcomes reported | Follow-up time periods |
Andryukhin, 2010[13] | Nurse-led care program | Mortality and rehospitalization | 18 mo |
Blue, 2001[14] | Specialist nurse intervention | Mortality, rehospitalization | 12 mo |
Cockayne, 2014[15] | Nurse facilitated self- management support | Rehospitalization | 12 mo |
Cui, 2019[16] | Nurse-led structured education program | Readmission, death | 12 months |
Domingues, 2010[17] | Nurse-led education and telephone monitoring | Rehospitalization, death | 3 mo |
Dunagan, 2005[18] | Nurse administered, telephone based disease management | Mortality and readmission | 6 and 12 mo |
Ekman, 1998[19] | Nurse-monitored outpatient care program | Mortality, readmission | 6 mo |
Emiliane, 2014[20] | Nurse-based strategy | Mortality, readmission | 6 mo |
Ortiz-Bautista, 2018[21] | Nurse-led intervention program | Readmission, mortality | 24 mo |
Pieta, 2006[22] | Physician and nurse directed heart failure clinic | Readmission, mortality | 12 mo |
Riegel, 2002[23] | Standardized nurse case-management telephone intervention | Readmission, mortality | 3 and 6 mo |
Sisk, 2006[24] | Nurse-management in minority communities | Rehospitalization | 12 mo |
Stewart, 2015[25] | Nurse-led home based and clinic based secondary prevention program | Rehospitalization. mortality | 51 mo |
Stromberg, 2003[26] | Nurse-led heart failure clinic | Mortality and rehospitalization | 3 and 12 mo |
You, 2020[27] | Nurse-led program of care | Mortality, rehospitalization | 3 mo |
Note: Readmission and rehospitalization have the same meaning.
In this analysis, 2 major outcomes were assessed, namely:
- (a) Rehospitalization or readmission, which was defined as the act of being admitted to the hospital again after having recently been discharged from the hospital.
- (b) Mortality including death of any cause.
The follow up time period was divided into:
- (a) A short term follow-up time period ranging from 3 to 6 months;
- (b) A longer follow-up duration ranging from 12 to 24 months.
2.4 Data extraction and quality assessment
Data were extracted by 5 independent authors. First of all, the names of authors, the publishing year, and the type of study were retrieved. Secondly, the total number of CHF patients who were randomly assigned to a nurse-led intervention vs a usual care setting was extracted from each study and the total sum was calculated. Data reporting the methodological quality were also extracted for assessment later. In addition, the baseline features including CHF patients' left ventricular ejection fraction, the comorbidities, the mean age and the respective gender were also extracted. Any disagreement which occurred during this stage of data extraction was thoroughly solved by a careful discussion.
The methodological quality of the randomized trials was assessed based on the criteria suggested by the Cochrane collaboration.[11] Grades (A, B, or C) were allotted signifying low, moderate or high bias risks respectively.
2.5 Statistical analysis
For this analysis, the latest version of the RevMan software (version 5.3) was used. Risk ratios (RR) with 95% confidence intervals (CI) were used to represent data following analysis.
The Q statistic test was used to assess for heterogeneity. A P value less or equal to .05 was considered significant statistically. The I2 statistic test was another test which was used to assess for heterogeneity. An increase in heterogeneity was dependent on an increase in the I 2 value.
A fixed statistical effect model was used if a low heterogeneity was present, or else a random effect model was used.
Sensitivity analysis was also carried out. Publication bias was visually observed through funnel plots.
2.6 Ethical approval
Ethical approval or any board review approval was not required for this study. This analysis involved data which were extracted from previously published original studies.
3 Results
3.1 Outcomes of search databases
A total number of 987 articles were obtained through the searched databases (PRISMA guideline).[12]
The authors carefully assessed the titles and abstracts, and irrelevant studies were eliminated, resulting in a total number of 95 full text articles which were finally assessed for eligibility.
Another careful assessment was carried out with the full text articles, and studies were eliminated once again based on the following criteria:
- 1. Nonrandomized studies (n = 14);
- 2. Review articles (n = 7);
- 3. Case studies (n = 8);
- 4. Studies which did not report the required endpoints (n = 9);
- 5. Studies which were published in a different language (n = 6);
- 6. Duplicated studies (n = 36).
Finally only 15 studies[13–27] were included in this analysis as shown in Figure 1.
3.2 General features of the studies which have been included in this analysis
A total number of 3282 participants with CHF were included in this analysis. A total of 1571 patients were assigned to the nurse-led intervention group whereas 1711 patients were assigned to the usual care setting as shown in Table 2. All the studies were randomized trials.
Table 2 - General features of the studies.
Studies | Type of study | No of CHF patients in the intervention group (n) | No of CHF patients in the control group (n) | Total No of patients (n) | Bias risk grade |
Andryukhin, 2010 | RCT | 44 | 41 | 85 | B |
Blue, 2001 | RCT | 84 | 81 | 165 | B |
Cockayne, 2014 | RCT | 95 | 165 | 260 | B |
Cui, 2019 | RCT | 48 | 48 | 96 | B |
Domingues, 2010 | RCT | 48 | 63 | 111 | B |
Dunagan, 2005 | RCT | 76 | 75 | 151 | B |
Ekman, 1998 | RCT | 79 | 79 | 158 | B |
Emiliane, 2014 | RCT | 117 | 126 | 243 | B |
Ortiz-Bautista, 2018 | RCT | 87 | 40 | 127 | B |
Pieta, 2006 | RCT | 118 | 122 | 240 | B |
Riegel, 2002 | RCT | 130 | 228 | 358 | B |
Sisk, 2006 | RCT | 203 | 203 | 406 | B |
Stewart, 2015 | RCT | 310 | 314 | 624 | B |
Stromberg, 2003 | RCT | 52 | 54 | 106 | B |
You, 2020 | RCT | 80 | 72 | 152 | B |
Total No of participants (n) | 1571 | 1711 | 3282 |
CHF = chronic heart failure, RCT = randomized controlled trials.
Based on the methodological assessment, a grade "B" was allotted to the randomized trials implying moderate bias risk among all the studies.
3.3 Baseline features of the participants
Baseline characteristics of the CHF participants have been listed in Table 3. Left ventricular ejection fraction varied from 29.0% to 61.0%. Comorbidities including hypertension (24.6%–80.0%) and diabetes mellitus (16.7%–59.7%) were also reported. The original studies consisted of male patients varying from 27.3% to 73.8%. The patients had a mean age of 50.8 to 80.3 years as shown in Table 3.
Table 3 - Baseline features of the participants.
Age (yrs) | Males (%) | HBP (%) | DM (%) | LVEF (%) | |
Studies | NI/UC | NI/UC | NI/UC | NI/UC | NI/UC |
Andryukhin, 2010 | 66.5/68.0 | 27.3/34.2 | — | — | — |
Blue, 2001 | 74.4/75.6 | 64.0/51.0 | 43.0/52.0 | 18.0/19.0 | — |
Cockayne, 2014 | 70.3/70.8 | 72.6/72.1 | — | - | — |
Cui, 2019 | 55.1/56.6 | 72.9/68.8 | 27.1/31.3 | 20.8/16.7 | 43.5/42.1 |
Domingues, 2010 | 62.0/63.0 | 67.0/51.0 | 25.0/33.0 | — | 29.0/29.0 |
Dunagan, 2005 | 70.5/69.4 | 41.0/47.0 | — | — | — |
Ekman, 1998 | 80.3/80.3 | 58.0/58.0 | — | 30.0/25.0 | — |
Emiliane, 2014 | 62.0/63.0 | 61.0/64.3 | 26.0/25.5 | - | 29.2/30.1 |
Ortiz-Bautista, 2018 | 74.0/75.0 | 69.0/68.0 | 79.0/80.0 | 43.0/35.0 | 36.0/36.0 |
Pieta, 2006 | 70.0/71.0 | 66.0/79.0 | 39.0/43.0 | 31.0/28.0 | 30.6/31.3 |
Riegel, 2002 | 72.5/74.6 | 53.8/46.1 | 24.6/42.0 | 43.1/41.6 | — |
Sisk, 2006 | 59.6/59.3 | 55.2/52.2 | 70.0/71.4 | 36.5/39.9 | — |
Stewart, 2015 | 66.0/66.0 | 68.0/73.0 | 60.0/63.0 | 26.0/26.0 | 60.0/61.0 |
Stromberg, 2003 | 77.0/78.0 | 63.5/59.3 | 50.0/29.6 | 15.4/31.5 | — |
You, 2020 | 50.8/51.3 | 73.8/73.6 | 71.3/72.2 | 58.8/59.7 | 39.0/39.4 |
DM = diabetes mellitus, HBP = high blood pressure, LVEF = left ventricular ejection fraction, NI = nurse-led intervention, UC = usual care.
3.4 Rehospitalization and mortality
Results of this current analysis showed that rehospitalization (RR: 0.81, 95% CI: 0.74–0.88; P = .00001) and mortality (RR: 0.69, 95% CI: 0.56–0.86; P = .0009) were significantly lower among CHF patients who were assigned to the nurse-led intervention as shown in Figure 2.
Even during a shorter follow-up time period of 3 to 6 months, rehospitalization (RR: 0.73, 95% CI: 0.65–0.82; P = .00001) and mortality (RR: 0.55, 95% CI: 0.38–0.80; P = .002) were significantly lower in the nurse-led interventional group when compared to the usual care setting as shown in Figure 3.
During a longer follow-up time period of 12 to 24 months, rehospitalization (RR: 0.81, 95% CI: 0.72–0.91; P = .0003) and mortality (RR: 0.76, 95% CI: 0.58–0.99; P = .04) were still significantly in favor of the nurse-led intervention as shown in Figure 4.
3.5 Sensitivity analysis and publication bias
Sensitivity analysis was carried out. Each time the new result was compared with previous ones to observe for any significant deviation from the main results. However, consistent results were obtained all over. In addition, a funnel plot was generated through RevMan to visually observe publication bias as shown in Figure 5.
4 Discussion
With new development in the medical line, several new techniques to diagnose and manage heart failure have been introduced. Nowadays, multidirectional strain parameters derived from three-dimensional echocardiography for predicting left ventricular remodeling after myocardial infarction are being used.[28] Newer cardiac assisted devices for decompensated heart failure have also been introduced.[29] The magnetic levitated centrifugal continuous flow circulatory pump and the axial continuous flow pump for advanced heart failure have also been developed.[30] However, mortality rate due to heart failure, and the rate of readmission for the same chronic disease have still not decreased. The European Society of Cardiology guidelines recommend the implementation of nurse-led heart failure programs to achieve optimal management of CHF.[7]
In this current analysis, the authors demonstrated that NLI were associated with significantly lower rehospitalization and mortality in patients with CHF (with reduced ejection fraction) whether during a short or long term follow up time periods.
To support the results of this analysis, a recent retrospective review including 413 patients with decompensated heart failure showed that a nurse-led heart failure program was independently associated with an increased survival rate among these patients,[31] supporting the results of this analysis. Another Hong Kong based study further supported the result of our current analysis showing that in a nurse-led heart failure clinic whereby interventions were carried out by nurses,[32] mortality rate and rehospitalization were significantly decreased in comparison to patients who were not intervened by these nurses.
In addition, in a multisite implementation study which showed the evaluation of a nurse practitioner disease management model for CHF, it was discussed that there was less admission due to CHF or any other cause in the nurse-led intervention group at 1 year.[33] It was shown that this improved outcome was most probably due to the care and coordination which were provided by the nurse practitioners. They carefully monitored comorbidities such as diabetes, hypertension, and coronary artery disease which were directly linked to heart failure. It was also suggested that nurses would motivate and educate patients to change their life habits, referred patients to relevant specialities which were concerned when required, and would motivate them to maintain medication compliance in order to reduce acute exacerbation of their CHF and other chronic diseases. All these would partly be associated with reduced readmission to hospitals.
Also, the specialized nurses in nurse-led clinics were responsible for the prescription and titration of heart failure medications.[33] They were familiar with the current heart failure guidelines and would review their patients on a regular basis and were specialized to only treat heart failure patients.
At last, a systematic review and meta-analysis highlighted the potential ability of heart failure management programs which were carried out by nurse intervention predischarge to reduce hospital readmission.[34] Our present analysis, which additionally assessed mortality and rehospitalization during a shorter and longer follow up time period respectively, is in favor of a nurse-led intervention program for the management of patients with CHF. Implementation of this practice might be cost effective and beneficial in terms of minimizing readmission, and prolonging survival rate in these patients.
5 Limitations
The types of nursing interventions were not similar in all of the original studies. Even though all the original studies involved NLI, minor differences in their approach might contribute to the limitation of this analysis. Another limitation might be due to the fact that the follow-up time periods were not similar in all of the studies. Moreover, since in this analysis we could not assess the causes of mortality of the patients with CHF, this might be considered as another limitation of this analysis. In addition, the duration of this chronic disease was not reported in many of the original studies. Also, we have ignored the medications which could have had an impact in reducing readmission and mortality in these patients. At last, all the trials which were included in this analysis involved heart failure patients with reduced ejection fraction except for one study which consisted of heart failure participants with preserved ejection fraction. However, because the particular trial only consisted of a minor number of participants, even if it has been included in this analysis, it would not have any major impact on the outcomes.
6 Conclusions
This systematic review and meta-analysis of randomized controlled trials showed that NLI had significant impacts in reducing the risk of rehospitalization and mortality in these patients with CHF (with reduced ejection fraction). Hence, we believe that nurse-led clinics and other interventional programs would be beneficial to patients with heart failure and this practice should be implemented to the health care system.
Author contributions
Conceptualization: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Data curation: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Formal analysis: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Funding acquisition: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Investigation: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Methodology: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Project administration: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Resources: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Software: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Supervision: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Validation: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Visualization: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Writing – original draft: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
Writing – review & editing: Xiaoqin Qiu, Chunhan Lan, Jinhua Li, Xi Xiao, Jinlian Li.
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Keywords:
congestive heart failure; mortality; nurse intervention; nurse-led clinics; readmission; risk ratio
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