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ORIGINAL ARTICLE
Year : 2019  |  Volume : 23  |  Issue : 3  |  Page : 373-378

Thyroid symptomatology across the spectrum of hypothyroidism and impact of levothyroxine supplementation in patients with severe primary hypothyroidism


1 Department of Endocrinology, Venkateshwar Hospitals, Dwarka, New Delhi, India
2 Department of Internal Medicine, Maharaja Agrasen Hospital, Punjabi Bagh, New Delhi, India
3 Department of Endocrinology, Maharaja Agrasen Hospital, Punjabi Bagh, New Delhi, India
4 Department of Endocrinology, Bharti Hospital, Karnal, Haryana, India
5 Department of Medicine, Division of Endocrinology, Gandhi Medical College and Hamidia Hospital, Bhopal, India

Correspondence Address:
Deepak Khandelwal
Department of Endocrinology and Diabetes, Maharaja Agrasen Hospital, Punjabi Bagh, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijem.IJEM_78_19

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Objective: This study aimed to determine the clinical and biochemical profile of patients with severe primary hypothyroidism (SPH) (TSH ≥40 μIU/ml) as compared to milder forms of hypothyroidism and document improvement in hypothyroidism symptoms in SPH. Methods: Thyroid symptomatology and biochemistry were evaluated in SPH, non-severe overt primary hypothyroidism (NSOPH; TSH <40 μIU/ml), subclinical hypothyroidism (ScH) and healthy controls. A total of 598 consecutive patients of hypothyroidism were screened of which 461 patients' data were analyzed (91 SPH, 130 NSOPH and 240 ScH). Thyroid symptomatology was re-evaluated at 12 weeks follow-up in SPH following restoration of euthyroidism with levothyroxine. Results: The median (interquartile range) age of patients was 35 (28-42) years with 91.6% female. The commonly noted symptomatology were shortness of breath (93.4%) and fatigueability (91.2%) in SPH, fatigueability (68.46%) and limbs swelling (43.07%) in NSOPH, and fatigueability (56.67%) and shortness of breath (32.92%) in ScH. All symptomatology were significantly higher in SPH. Delayed tendon reflex, carpel tunnel syndrome and meno-metrorrhagia were exclusive in SPH. Occurrence of menstrual irregularities was 73.62%, 28.46% and 16.25% in SPH, NSOPH and ScH, respectively. SPH patients had significantly higher cholesterol and triglycerides. There was significant improvement in symptomatology, reduction in body weight (−2.11 kg), improvement in hemoglobin (+0.64 g/L) with fall in total cholesterol (−18.96%), LDL-cholesterol (−23.46%) and triglycerides (−13.53%) following euthyroidism restoration in subjects with SPH. Common residual symptoms were fatigue (10%), poor memory (8%) and menstrual irregularities (6%). Conclusion: Thyroid symptomatology differs significantly across spectrum of hypothyroidism, being significantly worse in SPH. Euthyroidism restoration is associated with reversal of majority of thyroid symptomatology.


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