LAUSR

PURPOSE A mother's behaviour towards her infant is an important aspect of assessment in postpartum severe mental illness (SMI). The existing tools for this purpose need formal training, require time and do not include certain aspects of maternal behaviour. Hence, there is a need for a tool that may overcome some of the above problems and be simple to use, especially in limited resource low and middle income countries (LAMIC) settings. The NIMHANS Maternal Behaviour Scale was constructed for this purpose. METHODS The 16 items were compiled based on 100 detailed assessments of mother-infant dyads. The NIMBUS is rated based on observations and information from caregivers, health assistants and nurses. The scale which has six domains was administered to 51 mother-infant dyads admitted to an MBU to establish construct validity and internal consistency. Inter-rater, and test retest reliability were also established. External validity was established using the Bethlem Mother infant Interaction Scale (BMIS) and the Postpartum Bonding Questionnaire (PBQ). RESULTS The scale was found to have adequate inter-rater and test retest reliability (Cohen's kappa > 0.81). The Cronbach's alpha for internal consistency was 0.94 and it showed adequate external validity when used with the BMIS (R = 0.947, p = 0.000) and PBQ. CONCLUSION The NIMBUS appears to be a useful tool to assess maternal behaviour among mothers with SMI in the postpartum especially in LAMIC situations where observations are often made by family members and health assistants rather than trained perinatal nurses.