Metered-dose inhalers vs nebulization for the delivery of albuterol in pediatric asthma exacerbations: A cost-effectiveness analysis in a middle-income country

Genotype-driven asthma prescribing of inhaled corticosteroids and long-acting β2-agonist: A cost-effectiveness analysis

INTRODUCTION

Predicting response to inhaled corticosteroids (ICSs) + long-acting β2-agonist (LABA) by previously detecting the presence of Arg16Gly ADRB2 genotype is a strategy that could reduce and optimize the management of asthmatic patients. There is a need for economic evaluations to facilitate the implementation of such tests. This research aims to evaluate the cost-effectiveness of Arg16Gly ADRB2 screening in children with asthma in Colombia.

METHODS

From the perspective of a third-party payer, we conducted a cost-effectiveness analysis to determine the cost and quality-adjusted life-years (QALYs) of genotype-driven asthma prescribing based on the Arg16Gly ADRB2 genotype versus current treatment based on no genetic testing. Using four state-transition models, we estimate cost and QALYs employing micro-simulation modeling with a time horizon of 10 years and a cycle length of 1 week. Cost-effectiveness was assessed at a willingness-to-pay (WTP) value of US$5180.

RESULTS

The mean incremental cost of strategy genetic testing versus no genetic testing is US$ -6809. The mean incremental benefit of strategy genetic testing is 16 QALYs. The incremental net monetary benefit of strategic genetic testing versus no genetic testing is US$ 88,893. Genetic testing is the strategy with the highest expected net benefit. The outcomes derived from our primary analysis remained robust when subjected to variations in all underlying assumptions and parameter values.

CONCLUSION

Genetic testing of Arg16Gly ADRB2 is a cost-effective strategy to address asthma management in asthmatic children requiring ICS+LABA. This result should encourage the generation of more evidence and the incorporation of such evidence into clinical practice guidelines for pediatric asthma.

Cost-utility analysis of prenatal supplementation with long-chain n-3 fatty acids to reduce the incidence of wheezing and asthma in neonates

INTRODUCTION

Recent evidence indicates that Maternal Supplementation with Long-Chain n-3 Fatty Acids During Pregnancy Substantially Mitigates Offspring's Asthma. Adding information regarding its cost-utility will undoubtedly allow its adoption, or not, in clinical practice guidelines. This research aimed to determine the cost-utility of LCPUFA supplementation in the third trimester of pregnancy to reduce the risk of wheezing and asthma in infants in Colombia.

METHODS

A Markov model was formulated to estimate the cost and quality-adjusted life-years (QALYs) attributed to individuals with severe asthma in Colombia, with a time horizon of five years and a cycle length of two weeks. Probabilistic sensitivity analysis and a value of information (VOI) analysis were conducted to evaluate the uncertainties in the case base. Cost-utility was assessed at a willingness-to-pay (WTP) value of US$5180. All costs were adjusted to 2021 with a 5% annual discounting rate for cost and QALYs.

RESULTS

The mean incremental cost of LCPUFA supplementation versus no supplementation was US-43.65. The mean incremental benefit of LCPUFA supplementation versus no supplementation was 0.074 QALY. The incremental cost-utility ratio was estimated at US$590.68 per QALY. The outcomes derived from our primary analysis remained robust when subjected to variations in all underlying assumptions and parameter values.

CONCLUSION

Supplementation strategy supplementation with long-chain n-3 fatty acids during pregnancy is cost-effective in reducing the risk of developing asthma during childhood in Colombia.

Vitamin D supplementation for children with mild to moderate asthma: an economic evaluation

INTRODUCTION

A large proportion of asthma patients remain uncontrolled despite using inhaled corticosteroids. Some add-on therapies such as vitamin D supplements have been recommended for this subgroup of patients. The purpose of this study was to assess the cost-utility of vitamin D supplementation in children with mild to moderate persistent asthma in Colombia.

METHODS

A probabilistic Markov model was created to estimate the cost and quality-adjusted life-years (QALYs) of patients with severe asthma in Colombia. The model was analyzed probabilistically, and a value of information (VOI) analysis was conducted to inform the value of conducting further research to reduce current uncertainties in the evidence base. Cost-effectiveness was evaluated at a willingness-to-pay (WTP) value of US$5180.

RESULTS

The mean incremental cost of vitamin D supplementation versus no supplementation is USD $44.60. The mean incremental benefit of vitamin D supplementation versus no supplementation is 0.05 QALY. This position of absolute dominance (vitamin D supplementation has lower costs and higher QALYs than no supplementation) is unnecessary to estimate the incremental cost-effectiveness ratio. Our base-case results were robust to variations in all assumptions and parameters.

CONCLUSION

Add-on therapy with vitamin D supplementation is a cost-effective strategy for patients between 6 and 17 years of age with mild to moderate asthma in Colombia.

Assessment and management of asthma exacerbations in an emergency department unit

BACKGROUND

The Pediatric Respiratory Assessment Measure (PRAM) score is a useful tool for the assessment of asthma exacerbations in children. This study aimed to estimate the risk of hospitalization in children, assessed with the PRAM score and having mild-moderate asthma exacerbation, who were treated with salbutamol delivered via a metered-dose inhaler and spacer (MDI/S).

METHODS

The study population consisted of children aged 3-16 years with mild-moderate asthma exacerbations. All children received 1mg/kg prednisolone p.o. (max 40 mg) and 4-6 puffs of salbutamol via MDI/S.

RESULTS

Fifty patients participated in the study. Admission was associated positively with the initial PRAM score (OR: 18.91, CI: 2.42-123.12, P = 0.005) and negatively with the improvement in PRAM score (OR: 0.52, CI: 0.01-0.78, P = 0.032).

CONCLUSION

PRAM is a reliable tool that can be used effectively to estimate the asthma exacerbation severity.

Dupilumab in children with moderate-to-severe asthma: A cost utility analysis

INTRODUCTION

Dupilumab is an effective and safe medicine for the management of severe asthma. Due to its high cost, concerns are generated regarding its cost-effectiveness. This study aimed to estimate the cost-utility of dupilumab plus standard of care (SoC) versus SoC alone in children between 6 and 11 years old with severe asthma and eosinophilic phenotype.

METHODS

A Markov-type model was developed to estimate costs and health outcomes of a simulated cohort of pediatric patients with persistent asthma treated over a 6-year period. To determine the robustness of the model deterministic and probabilistic sensitivity analyses were conducted.

RESULTS

The quality-adjusted life-years (QALYs) per patient estimated were 0.85 with dupilumab and 0.84 with SoC. The total mean of discounted costs per patient per cycle were US$ 379 for dupilumab and US$ 19 for SoC. The incremental cost-effectiveness ratio estimated was $24 660 US$ per QALY CONCLUSION: Dupilumab is not cost-effective in Colombia in children between 6 and 11 years old with severe asthma and eosinophilic phenotype. Our evidence should motivate regulatory agencies to improve negotiations for new drugs with better information and evidence.

Tiotropium for children and adolescents with severe asthma

IntroductionAn important proportion of asthma patients remain uncontrolled despite using inhaled corticosteroids and long-acting beta-agonists. Some add-on therapies, such as tiotropium bromide have been recommended for this subgroup of patients. The purpose of this study was to assess the cost-effectiveness of tiotropium as add-on therapies to ICS + LABA for children and adolescents with uncontrolled allergic asthma.MethodsA probabilistic Markov model was created to estimate the cost and quality-adjusted life-years (QALYs) of patients with severe asthma in Colombia. Total costs and QALYS of two interventions including standard therapy (ICS + LABA), and add-on therapy with tiotropium, were calculated over a time horizon from 6 to 18 years. Probability sensitivity analyses were conducted.ResultsFor a patient with severe asthma, our markov model showed that compared to standard therapy, add-on therapy with tiotropium was associated with higher treatment costs and QALY . The incremental cost-effectiveness ratio estimated was US$2,017 in the probabilistic model after Monte-Carlo simulation. Our base-case results were robust to variations in all assumptions and parameters. The incremental net monetary benefit of US$327 with a 95% credible interval of US$396 to US425.ConclusionAdd-on therapy with tiotropium was cost-effective when added to usual care in children and adolescents with severe asthma who remained uncontrolled despite treatment with medium or high-dose ICS/LABA. Our study provides evidence that should be used by decision-makers to improve clinical practice guidelines and should be replicated to validate their results in other middle-income countries.

Fractional exhaled nitric oxide and eosinophil count in induced sputum to guide the management of children with asthma: a cost-utility analysis

Introduction

Previous evidence has shown that fractional exhaled nitric oxide (FeNO) and eosinophil count in induced sputum (EO) are cost-effective relative to standard of care in guiding the management of children with persistent asthma. There is some doubt as if there are differences between these two biomarkers in terms of costs and benefits. Clarifying this doubt would allow prioritization of the design of clinical practice guidelines. The study aimed to compare in terms of costs and benefits these biomarkers in patients with asthma between 4 and 18 years of age.

Methods

A Markov model was used to estimate the cost-utility of asthma management using FeNO and EO in patients between 4 and 18 years of age. Transition probabilities, cost and utilities were estimated from previously published local studies, while relative risks were obtained from the systematic review of published randomized clinical trials. The analysis was carried out from a societal perspective.

Results

The expected annual cost per patient with EO was US $1376 (CI 95% US $1376–US $1377) and for FeNO was US $1934 (CI 95% US $1333–US $1334), with a difference of US $42.3 between these strategies. The Quality-adjusted life years (QALYs) per person estimated with EO was 0.95 (CI 95% 0.951–0.952) and for FeNO was 0.94 (CI 95% 0.930–0.940), with a difference of 0.01 between these strategies. The NMB with EO was US $4902 (CI 95% 4900–4904) and for FeNO was US $4841 (CI 95% 4839–4843). The incremental cost-effectiveness ratio of EO was $3566 per QALY gained regarding FeNO.

Conclusion

Our study demonstrates that induced sputum-guided management is a strategy cost-effective over FeNO and standard asthma management in Colombia. This evidence should encourage the adoption of any of these techniques to objectively guide the management of children with asthma in routine clinical practice in low-resource settings.

The use of ipratropium bromide for treating moderate to severe asthma exacerbations in pediatric patients in an emergency setting: A cost-effectiveness analysis

OBJECTIVES

Although the efficacy of the addition of ipratropium bromide (IB) to short-acting β2-agonists (SABAs) for treating children with moderate to severe asthma exacerbations has been demonstrated, evidence of its cost-effectiveness is scarce. The aim of the present study was to evaluate the cost-effectiveness of treatment with a combination of SABAs and IB compared with SABAs alone for the treatment of children with moderate to severe asthma exacerbations.

METHODS

To achieve the objectives of the study, a decision-analysis model was adapted. Effectiveness parameters were obtained from a systematic review of the literature with meta-analysis. Cost data were obtained from hospital bills and from the national manual of drug prices in Colombia. The study was carried out from the perspective of the national healthcare system in Colombia. The main outcome of the model was avoidance of hospital admission.

RESULTS

In children with moderate to severe asthma exacerbations, the base-case analysis showed that compared to SABAs alone, treatment with a combination of SABAs and IB was associated with lower overall treatment costs (US$126.24 vs. US$170.69 mean cost per patient) and a higher probability of hospital admission avoided (0.7999 vs. 0.7100), thus leading to dominance. For children with severe asthma exacerbations, these values were US$132.99 versus US$170.69 and 0.7883 versus 0.7100, respectively.

CONCLUSIONS

In Colombia, when compared to therapy with SABAs alone, therapy with a combination of SABAs and IB for treating pediatric patients with moderate to severe asthma exacerbations involves a lower probability of hospital admission at lower treatment costs.

Cost utility of fractional exhaled nitric oxide monitoring for the management of children asthma

Introduction

Fractional exhaled nitric oxide is a simple, non-invasive measurement of airway inflammation with minimal discomfort to the patient and with results available within a few minutes. This study aimed to evaluate the cost-effectiveness of asthma management using fractional exhaled nitric oxide monitoring in patients between 4 and 18 years of age.

Methods

A Markov model was used to estimate the cost-utility of asthma management using fractional exhaled nitric oxide monitoring versus asthma management without using fractional exhaled nitric oxide monitoring (standard therapy) in patients between 4 and 18 years of age. Cost data were obtained from a retrospective study on asthma from a tertiary center, in Medellin, Colombia, while probabilities of the Markov model and utilities were obtained from the systematic review of published randomized clinical trials. The analysis was carried out from a societal perspective.

Results

The model showed that fractional exhaled nitric oxide monitoring was associated with a lower total cost than standard therapy (US $1333 vs. US $1452 average cost per patient) and higher QALYs (0.93 vs. 0.92 average per patient). The probability that fractional exhaled nitric oxide monitoring provides a more cost-effective use of resources compared with standard therapy exceeds 99% for all willingness-to-pay thresholds.

Conclusion

Asthma management using fractional exhaled nitric oxide monitoring was cost-effective for treating patients between 4 and 18 years of age with mild to moderate allergic asthma. Our study suggests evidence that could be used by decision-makers to improve clinical practice guidelines, but this should be replicated in different clinical settings.

Metered-dose inhalers versus nebulization for the delivery of albuterol for acute exacerbations of wheezing or asthma in children: A systematic review with meta-analysis

OBJECTIVES

The benefits of metered-dose inhalers with a spacer (MDI+S) have increasingly been recognized as an alternative method of albuterol administration for treating pediatric asthma exacerbations. The aim of this systematic review was to compare the response to albuterol delivered through nebulization (NEB) with albuterol delivered through MDI+S in pediatric patients with asthma exacerbations.

METHODS

We conducted an electronic search in MEDLINE/PubMed, EMBASE, Ovid, and ClinicalTrials. To be included in the review, a study had to a randomized clinical trial comparing albuterol delivered via NEB versus MDI+S; and had to report the rate of hospital admission (primary outcome), or any of the following secondary outcomes: oxygen arterial saturation, heart rate (HR), respiratory rate (RR), the pulmonary index score (PIS), adverse effects, and need for additional treatment.

RESULTS

Fifteen studies (n = 2057) met inclusion criteria. No significant differences were found between the two albuterol delivery methods in terms of hospital admission (relative risk, 0.89; 95% confidence interval [CI], 0.55-1.46; I²  = 32%; p = .65). There was a significant reduction in the PIS score (mean difference [MD], -0.63; 95% CI, -0.91 to -0.35; I²  = 0%; p < .00001), and a significantly smaller increase in HR (better; MD -6.47; 95% CI, -11.69 to -1.25; I²  = 0%; p = .02) when albuterol was delivered through MDI+S than when it was delivered through NEB.

CONCLUSIONS

This review, an update of a previously-published meta-analysis, showed a significant reduction in the PIS and a significantly smaller increase in HR when albuterol was delivered through MDI+S than when it was delivered through NEB.

The cost-utility of intravenous magnesium sulfate for treating asthma exacerbations in children

INTRODUCTION

Although evidence supports the use of intravenous magnesium sulfate (MS) in asthma exacerbations, MS continues to be considered a second-line drug for managing pediatric asthma exacerbations. This study aimed to evaluate the cost-utility of MS in asthma exacerbations.

METHODS

We used a decision tree model to estimate the cost-utility of MS compared to treatment without MS (control group) in children with asthma exacerbations. Cost data were obtained from a retrospective study from tertiary centers in Rionegro, Colombia, while utilities were collected from the literature. Probabilistic sensitivity analysis was carried out using the Monte Carlo technique with a simulation of a hypothetical cohort of 10 000 patients to generate expected cost utilities with 95% confidence intervals. We used a cost-effectiveness acceptability curve to evaluate the uncertainty surrounding the cost-utility of MS.

RESULTS

The model showed that MS had a lower total cost than the control group (US $1149 vs US $1598 average cost per patient) and higher quality-adjusted life years (0.60 vs 0.52 average per patient), showing dominance. The probability that MS provides a more cost-effective use of resources compared with standard therapy exceeds 99% for all willingness-to-pay thresholds.

CONCLUSION

Intravenous MS was less expensive and more effective than treatment without intravenous MS in children with asthma exacerbations. Our study provides evidence that should be used by decision-makers to improve clinical practice guidelines and should be replicated to validate its results in other middle-income countries.

Commercial valved spacers versus home-made spacers for delivering bronchodilator therapy in pediatric acute asthma: a cost-effectiveness analysis

Objective: Although valved spacers are the preferred method for administering metered-dose inhaler bronchodilators such as albuterol in pediatric acute asthma, their high cost and their lack of availability have limited their use, especially in low- and middle-income countries (LMICs). Because of this, it is a common practice to use home-made spacers, although a formal analysis evaluating their cost-effectiveness is lacking. Therefore, the objective of this study was to analyze the cost-effectiveness of home-made spacers compared to commercial valved spacers for delivering bronchodilator therapy in pediatric acute asthma.Methods: A decision-analysis model was used to estimate health outcomes and costs of a simulated cohort of pediatric patients treated for acute asthma. Effectiveness parameters were obtained from a systematic review of the literature. Cost data were obtained from hospital bills and from the national manual of drug prices in Colombia. The study was carried out from the perspective of the national healthcare system in Colombia, a middle-income country (MIC). The main outcome of the model was avoidance of hospital admission.Results: Base-case analysis showed that compared to commercial valved spacers, administering bronchodilators with home-made spacers results in lower overall treatment costs (US$126.75 vs. US$128.59 average cost per patient) without a significant difference in the probability of hospitalization avoided (0.8500 vs. 0.8500).Conclusions: The present study shows that in Colombia, an MIC, compared with commercial valved spacers, the use of home-made spacers for administering bronchodilator therapy is more cost-effective because it yields a similar probability of hospital admission at lower overall treatment costs.