Temporary childbirth migration (TCM), where women return to their natal homes for pregnancy, delivery or postpartum for a limited duration, is a long-standing sociocultural practice in India. While often motivated by familial support and traditional norms, its implications for maternal and child health and health system engagement remain poorly understood. This study aims to quantify the impact of TCM on maternal and newborn outcomes and to explore how continuity of perinatal care and social support mediate these relationships.

We are conducting a three-site, community-based, prospective cohort study across the Health and Demographic Surveillance System sites of Vadu (Maharashtra), Sevagram (Maharashtra) and DEESHA (Delhi). A total of 3000 pregnant women will be enrolled in pregnancy (

This study has been approved by the Ethics committees at the KEM Hospital Research Centre Pune (KEMHRC/RVM/EC/1931), Society for Applied Studies (SAS/ERC/TCM Study/2024), Mahatma Gandhi Institute of Medical Sciences (MGIMS/lEC/COMMED/8412023) and University of California San Francisco (22-36484). All research activities are conducted in accordance with Indian Council of Medical Research Guidelines for biomedical research and the Declaration of Helsinki. On study completion, findings will be disseminated to diverse local, national and global stakeholders and published in academic journals.

CTRI/2024/02/062881.

Although flow cytometric analysis of peripheral blood neutrophil myeloperoxidase expression can accurately rule out myelodysplastic neoplasms (MDS), it lacks reliability and efficiency due to the practical limitations of laboratory-developed liquid reagent-based assays. This study aimed to quantify the agreement and comparative discriminatory accuracy between a single-use flow cytometric lyophilised reagent tube (BD Lyotube Stain 468) and its laboratory-developed liquid reagent counterpart.

Cross-sectional diagnostic accuracy study of two index tests against a reference diagnosis.

A university hospital in France.

Consecutive adult patients with an indication for bone marrow aspiration due to suspected MDS and unexplained peripheral blood cytopenia.

MDS confirmed by cytomorphological evaluation of the bone marrow aspirate performed in duplicate by experienced haematopathologists blinded to the index test.

Of 103 participants enrolled between July 2020 and August 2021, 37 had MDS (prevalence, 36%). The median intra-individual robust coefficient of variation (RCV) for myeloperoxidase expression was 30.9% using the BD Lyotube Stain 468 and 31.2% using the laboratory-developed liquid reagent assay, with an intraclass correlation coefficient of 0.94 (95% CI 0.91 to 0.96). The areas under the receiver operating characteristic curves were 0.83 (95% CI 0.74 to 0.90) and 0.82 (95% CI 0.73 to 0.89), respectively. Using a prespecified threshold of 30.0%, the corresponding sensitivity estimates were 89% (95% CI 75% to 97%) and 95% (95% CI 82% to 99%).

BD Lyotube Stain 468 performs as well as its laboratory-developed liquid reagent counterpart for the quantification of myeloperoxidase expression by peripheral blood neutrophils. It may obviate the need for invasive bone marrow aspiration in up to 40% of patients with suspected MDS.

NCT04399018.