• Ghulam Mustafa, Muhammad Khalid, Ijaz Ahmed, and Muhammad Abu Talib.
• Prof. Dr. Ghulam Mustafa, FCPS (Pediatr Med.)., Department of Pediatric Medicine, The Children's Hospital & The Institute of Child Health, Multan, Pakistan.
• Pak J Med Sci. 2020 Jul 1; 36 (5): 1015-1019.

Background And ObjectiveParathormone (PTH) and serum Vitamin D3 (VD3) share a complex interplay where increased VD3 leads to a negative response on parathormone level. Our objective was to determine the correlation of parathormone (PTH) and Vitamin D3 (VD3) levels in nursing mothers and infants 1-6 months' age from South Punjab, Pakistan.MethodsThis study is a secondary data analysis of previously conducted cross sectional study which was conducted at the Department of Pediatric Medicine, Nishtar Medical University, Multan, during August 2010 to June 2011. Study included 67 infants 1-6 months of age and 60 nursing mothers. A venous blood sample was drawn for estimation of VD3, calcium, phosphate, alkaline phosphatase, parathormone and albumin. Spearman correlation coefficient was calculated to determine the inverse correlation between PTH and VD3 levels.ResultsMean age (in days) of the infants was 83±53.7 days whereas maternal mean age was 25.53 ± 4.12 years. Median VD3 level in infants was 20.90 ng/ml (IQR - 49.5). Median serum PTH levels were 20.90 pg/ml (IQR - 26.17). Median VD3 level in nursing mothers was 21.0 ng/ml (IQR 7.2- 43.8). Median maternal serum PTH levels were 20.89 pg/ml (IQR 2.9 - 232.4). Substantial negative relation between VD3 and parathormone in infants and mothers was not evident (r = - 0.027, p-value 0.83) and (r = 0.156, p-value 0.23) respectively. A significant positive association between infant and maternal VD3 was observed (rs -0.55, p-value < 0.001).ConclusionOur study affirms that the customary negative correlation between VD3 and parathormone levels does not exist.Copyright: © Pakistan Journal of Medical Sciences.

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