Markers of respiratory function response to high-carbohydrate and high-fat intake in patients with lung diseases: a systematic review with meta-analysis of randomized clinical trials.

BACKGROUND: Macronutrients can differently affect respiratory function markers such as VO2 , VCO2 , PaO2 , PaCO2 , and respiratory quotients (RQs), but systematic appraisal of the evidence on randomized clinical trials (RCTs) is lacking. OBJECTIVE: The objective of this work is to compare the response of respiratory function markers with high-carbohydrate and high-fat intake in patients with lung diseases. METHODS: Systematic review conducted according to Cochrane Collaboration recommendations, reported following Preferred Reporting Items for Systematic Reviews and Meta-Analysis for pairwise systematic reviews of interventions 2020. PubMed, EMBASE, Scopus, and Cochrane CENTRAL were searched up to July 2021. Two reviewers selected the RCTs and extracted the data. Risk of bias and the certainty of evidence were assessed by RoB 2 and Grading of Recommendations Assessment, Development, and Evaluation System criteria, respectively. Statistical and graphical data guided the publication bias investigation. Meta-analyses were conducted. RESULTS: We included 14 RCTs (362 participants), four of which were parallel. Most studies included patients with chronic obstructive pulmonary disease. High-fat intake decreased VCO2 (mean difference [MD] = -35.89 ml/min [95% confidence interval (CI), -45.24 to -26.21]); I² = 0%), VO2 (MD = -29.30 ml/min [95% CI, -40.94 to -17.66]; I² = 0%), PaCO2 mm Hg (MD = -4.62 [95% CI, -7.67 to -1.58]; I² = 84%), and RQ (MD = -0.08 [95% CI, -0.09 to -0.06]; I² = 0%) in the subset of parallel RCTs. In crossover RCTs, there was generally no evidence of effect except for a greater decrease in RQ (MD = -0.09 [95% CI, -0.12 to -0.02]; I² = 96%) in favor of high-fat intake. CONCLUSION: High-fat intake resulted in greater reductions of VCO2 , VO2 , PaCO2 , and RQ in adult patients with lung diseases. The certainty of the evidence is very low/low, and it precludes a specific recommendation on macronutrients contribution to energy intake of these patients.

NUTRITIONAL STATUS AND DIETARY INTAKE IN NON-CIRRHOTIC ADULT CHRONIC HEPATITIS C PATIENTS.

BACKGROUND: The hepatitis C virus is one of the main causes of liver disease worldwide and may develop nutritional deficiencies. OBJECTIVE: The objective of this study was to assess and compare different nutritional status methods of adult patients with chronic hepatitis C virus, and to describe inadequacies in dietary intake. METHODS: A cross-sectional study was conducted with adult outpatients with hepatitis C virus at a Brazilian hospital. Nutritional assessment included the 24-hour dietary recall, anthropometry (body weight, height, body mass index, triceps skinfold, mid-upper arm circumference, mid-arm muscle circumference, mid-upper arm muscle area, adductor policis muscle), Subjective Global Assessment, Royal Free Hospital Global Assessment and handgrip strength. RESULTS: A total of 94 outpatients (ages 30 to 76 years), was included, 46 were men. The prevalence of malnutrition as measured by the different methods was 6.4% (body mass index); 60.6% (handgrip strength), and 53.2% (Royal Free Hospital Global Assessment). There was correlation between mid-upper arm circumference and mid-arm muscle circumference (r=0.821), mid-upper arm circumference and triceps skinfold (r=0.575) and mid-upper arm circumference and mid-upper arm muscle area (r=0.781). Energy and protein intakes were below recommended levels in 49 (52.1%) and 44 (46.8%) of patients, respectively. Inadequate calcium, potassium, zinc and vitamin C intakes occurred in 92.6%, 97.9%, 63.8% and 60.6% of patients. There was an association between dietary energy and protein intake with Royal Free Hospital Global Assessment (P<0.001) and a tendency for them to be associated with handgrip strength (P=0.076 and P=0.054). CONCLUSION: Malnutrition is frequently in hepatitis C virus patients. They have high prevalence of inadequate energy, protein and micronutrients intake, even in the absence of cirrhosis.

NUTRITIONAL STATUS AND DIETARY INTAKE IN NON-CIRRHOTIC ADULT CHRONIC HEPATITIS C PATIENTS / Estado nutricional e ingestão dietética de adultos portadores de hepatite C crônica

BackgroundThe hepatitis C virus is one of the main causes of liver disease worldwide and may develop nutritional deficiencies.ObjectiveThe objective of this study was to assess and compare different nutritional status methods of adult patients with chronic hepatitis C virus, and to describe inadequacies in dietary intake.MethodsA cross-sectional study was conducted with adult outpatients with hepatitis C virus at a Brazilian hospital. Nutritional assessment included the 24-hour dietary recall, anthropometry (body weight, height, body mass index, triceps skinfold, mid-upper arm circumference, mid-arm muscle circumference, mid-upper arm muscle area, adductor policis muscle), Subjective Global Assessment, Royal Free Hospital Global Assessment and handgrip strength.ResultsA total of 94 outpatients (ages 30 to 76 years), was included, 46 were men. The prevalence of malnutrition as measured by the different methods was 6.4% (body mass index); 60.6% (handgrip strength), and 53.2% (Royal Free Hospital Global Assessment). There was correlation between mid-upper arm circumference and mid-arm muscle circumference (r=0.821), mid-upper arm circumference and triceps skinfold (r=0.575) and mid-upper arm circumference and mid-upper arm muscle area (r=0.781). Energy and protein intakes were below recommended levels in 49 (52.1%) and 44 (46.8%) of patients, respectively. Inadequate calcium, potassium, zinc and vitamin C intakes occurred in 92.6%, 97.9%, 63.8% and 60.6% of patients. There was an association between dietary energy and protein intake with Royal Free Hospital Global Assessment (P<0.001) and a tendency for them to be associated with handgrip strength (P=0.076 and P=0.054).ConclusionMalnutrition is frequently in hepatitis C virus patients. They have high prevalence of inadequate energy, protein and micronutrients intake, even in the absence of cirrhosis.

ContextoO vírus da hepatite C é uma das principais causas de hepatopatia no mundo todo. Hepatopatas podem apresentar deficiências nutricionais e desnutrição, influenciando no seu prognóstico.ObjetivoO objetivo do estudo foi avaliar o estado nutricional de pacientes adultos portadores crônicos do vírus da hepatite C, comparar os métodos de avaliação nutricional e descrever a prevalência de inadequação de ingestão alimentar.MétodosFoi realizado um estudo transversal em adultos portadores do vírus da hepatite C não cirróticos e não transplantados em acompanhamento ambulatorial no Hospital de Clínicas de Porto Alegre. A avaliação nutricional incluiu antropometria (peso, altura, índice de massa corporal, prega cutânea tricipital, circunferência do braço, circunferência muscular do braço, área muscular do braço e músculo adutor do polegar), Avaliação Subjetiva Global, Avaliação Subjetiva do Royal Free Hospital, dinamometria e Inquérito Recordatório de 24 horas.ResultadosDe 94 pacientes (idade: 30 a 76 anos), 46 eram homens. A prevalência de desnutrição foi de 6,4% (índice de massa corporal), 60,6% (dinamometria) e 53,2% (Avaliação Subjetiva do Royal Free Hospital). Houve correlação entre circunferência do braço e circunferência muscular do braço (r=0,821), circunferência do braço e prega cutânea tricipital (r=0,575), circunferência do braço e área muscular do braço (r=0,781). Ingestão energética abaixo do recomendado ocorreu em 49 (52,1%) indivíduos e baixa ingestão proteica em 44 (46,8%). Consumo inadequado de cálcio, potássio, zinco, vitamina C ocorreu em 92,6%, 97,9%, 63,8% e 60,6% da amostra, respectivamente e consumo excessivo de sódio ocorreu em 53,2%. Houve associação significativa entre o consumo de energia e proteína com o Avaliação Subjetiva do Royal Free Hospital (P<0,001) e uma tendência de associação com a dinamometria (P=0,076 e P=0,054).ConclusãoDesnutrição é frequente em portadores crônicos de hepatite C. Pacientes com vírus da hepatite C têm alta prevalência de ingestão energética e proteica inadequada.