Between non-COPD and COPD groups, difference of adjusted log-PTH levels also did not reach statistical significance ( P = 0.08); however, among COPD patients, there was significant increase of adjusted log-PTH level with severity of airflow limitation ( P = 0.03; Table 3 ).
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Parathyroid Hormone as a Novel Biomarker for Chronic Obstructive Pulmonary Disease: Korean National Health and Nutrition Examination Survey.
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