To examine the effect of diaphragmatic breathing (DB) on nausea, vomiting, and functional status among breast cancer patients undergoing chemotherapy in Indonesia. A quasi experimental study with non-equivalent pretest and posttest control group was conducted. A total of forty-eight breast cancer patients (24 DB and 24 control participants) undergoing chemotherapy participated in this study selected conveniently. DB intervention was performed to the intervention group after chemotherapy cycle twice a day for six days, meanwhile the control group received usual care. A set of questionnaires was used to collect data consisting of Patient Information Form, Rhodes Index Nausea, Vomiting and Retching (RINVR) and The Functional Living Index-Cancer (FLI-C). Data were analyzed and interpreted using Generalized Linear Model, Wilcoxon Test, Paired T Test and Mann-Whitney test. There were significant changes in RINVR mean scores for the intervention group that started on the third day after chemotherapy ( = 0.000); meanwhile, the significant changes in RINVR mean scores for the control group began on the fifth day ( = 0.000). The total score of FLI-C was significantly different between the intervention and control groups = 0.000). DB could decrease nausea and vomiting, and increase functional status of breast cancer patients undergoing chemotherapy. It can be promoted as a useful low-cost self-management approach and an additional and complementary therapy to manage chemotherapy-related nausea and vomiting.

中文翻译：

---

膈式呼吸对乳腺癌化疗患者恶心、呕吐及功能状态的影响

旨在检查膈式呼吸 (DB) 对印度尼西亚接受化疗的乳腺癌患者恶心、呕吐和功能状态的影响。进行了非等效前测和后测对照组的准实验研究。总共 48 名接受化疗的乳腺癌患者（24 名 DB 参与者和 24 名对照参与者）方便地选择参加了本研究。干预组化疗周期结束后进行DB干预，每天两次，持续六天，对照组接受常规护理。使用一组问卷收集数据，包括患者信息表、恶心、呕吐和干呕罗德指数 (RINVR) 和癌症功能生活指数 (FLI-C)。使用广义线性模型、Wilcoxon 检验、配对 T 检验和 Mann-Whitney 检验对数据进行分析和解释。化疗后第三天开始的干预组的 RINVR 平均评分有显着变化（ = 0.000）；与此同时，对照组的 RINVR 平均分数从第五天开始出现显着变化 (= 0.000)。干预组和对照组之间的 FLI-C 总分存在显着差异 = 0.000）。 DB 可以减少恶心和呕吐，并改善接受化疗的乳腺癌患者的功能状态。它可以作为一种有用的低成本自我管理方法和一种额外的补充疗法来推广，以控制化疗相关的恶心和呕吐。