Vitamin D status of low birth weight infants in Delhi: a comparative study.

Abstract:

OBJECTIVE:To evaluate vitamin D status of preterm and term low birthweight (LBW) and term normal birth weight (NBW; weight ≥ 2500 g) infants at birth and in early infancy. METHODS:We enrolled 220 LBW and 119 NBW infants along with their mothers. Blood samples of both infants and mothers were taken within 48 h of birth, and that of infants were repeated at 3 months. Serum levels of calcium, phosphate, alkaline phosphatase, 25 hydroxyvitamin D (25OHD) and parathormone (PTH) were estimated using standard tests. Our primary outcome was vitamin D deficiency (VDD; serum 25OHD <20 ng/ml in mothers and <15 ng/ml in infants). Other outcomes were raised PTH (>46 pg/ml), raised AlkP (>120 U/l in mothers and 420 U/l in infants), and clinical rickets. FINDINGS:VDD was present in 186 (87.3%) of LBW and 103 (88.6%) of NBW infants at birth, and in 77 (60.6%) of LBW and 55 (71.6%) of NBW infants at a median corrected age of 12 and 15 weeks, respectively. VDD was almost universal (93-97%) among mothers of both groups. Raised PTH was present in 138 (63.6%) of LBW and 48 (41.4%) of NBW infants at birth, and in 58 (45.7%) of LBW and 38 (49.3%) of NBW infants at follow-up. Clinical rickets was present in 17 (13.4%) of LBW and 4 (4.9%) of NBW infants at 12-14 weeks of corrected age. CONCLUSIONS:High prevalence of VDD in LBW as well as NBW infants with clinical rickets at an early age underlines the need to study the effect of various vitamin D supplementation regimens in these infants to identify the optimal dose.

journal_name

J Trop Pediatr

authors

Agarwal R,Virmani D,Jaipal ML,Gupta S,Gupta N,Sankar MJ,Bhatia S,Agarwal A,Devgan V,Deorari A,Paul VK,Investigators of LBW Micronutrient Study Group, Departments of Pediatrics and Endocrinology.

doi

10.1093/tropej/fms013

subject

Has Abstract

pub_date

2012-12-01 00:00:00

pages

446-50

issue

6

eissn

0142-6338

issn

1465-3664

pii

fms013

journal_volume

58

pub_type

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