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The exact cause behind IPF is not known. However, there are certain risk factors that are associated with the risk of developing idiopathic pulmonary fibrosis. These risk factors are, older age (above 50), exposure to metal dust or wood dust at home or workplace, genetics, having acid reflux condition, and smoking. Diagnosis of IPF includes various tests like chest X-ray, biopsy, Pulse oximetry, arterial blood gas tests, High-resolution chest CT, and Spirometry.