Low birth weight baby is defined as a birth weight of?

Appeared in: UPPSC-2021

Explanation

The World Health Organization (WHO) and international medical consensus define Low Birth Weight (LBW) as a birth weight of less than 2500 grams (2.5 kg).
This definition applies regardless of the infant's gestational age, meaning it includes both preterm babies and full-term babies who are small for their gestational age (SGA).
Birth weight is a primary determinant of an infant's chances of survival, healthy growth, and development.
The cut-off of 2500 grams is a globally recognized standard for identifying at-risk newborns who require special care and monitoring.

Option A: A birth weight of less than 2000 grams is a sub-category within low birth weight, but it does not define the initial threshold for LBW.
Option C: A birth weight of 2800 grams is considered within the normal range for many populations, including the average for newborns in India. It is not the cutoff for defining low birth weight.
Option D: A birth weight of 3000 grams is a healthy, normal birth weight and is well above the threshold for low birth weight.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of Low Birth Weight (LBW) as background academic context rather than a clinical decision trigger.
Nurses must immediately identify LBW infants to initiate protocols for thermal regulation (radiant warmer, Kangaroo Mother Care), blood glucose monitoring, and feeding support to prevent complications like hypothermia and hypoglycemia.
LBW is a critical factor in calculating fluid and nutritional requirements, as these infants have higher metabolic needs but immature organ systems, requiring precise management.
Patient education is a key nursing role. Nurses must teach parents of LBW infants about danger signs (e.g., poor feeding, lethargy, temperature instability) and specialized care techniques like Kangaroo Mother Care (KMC).

How to Approach the Question

This is a factual recall question that tests your knowledge of a standard medical definition.
First, identify the key term in the question: 'Low birth weight baby'.
Recall the internationally accepted definition for this term, which is a specific weight threshold.
Evaluate the given options against this standard definition.
Eliminate options that represent normal birth weights (like 2800g and 3000g) or sub-classifications (like 2000g, which is closer to VLBW).
Select the option that exactly matches the WHO-defined cutoff for Low Birth Weight.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 30-32

E6 Text Book Of Pediatric Nursing 3rd Panchali Pal — Part 1 (pp 36-238 of 713) p. 177-179

E6 Nutrition Kumud Khanna 2e p. 133-135

Practise the full UPPSC-2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.