This study is open to adults aged 18 years and older who have pulmonary fibrosis with or without a known cause (or other forms of pulmonary fibrosis).

The purpose of this study is to better understand coughing in people with pulmonary fibrosis. To do this, a wearable cough monitor called Strados Remote Electronic Stethoscope Platform (RESP) is used. This device will measure how often and how forceful coughing is in people with pulmonary fibrosis.

All participants in the study get the device. It is placed on their skin over the chest.

Participants are in the study for 3 months. During this time, they visit the study site 2 to 3 times. 4 visits are done at the participant's home by video call with the site staff.

During the study, the device measures coughing over 24 hours. This is done on 4 days. Participants fill in questionnaires about their coughing and doctors regularly check participant's lung function. A breathing test that measures how well the lungs are working is performed both in the office and during home visits. The doctors also regularly check participants' health and take note of any unwanted effects.

This study will also record patients' experiences using the cough monitor and video assisted breathing tests at visits 3, 4, 5 and 6 at home.

Inclusion criteria

• Provision of signed informed consent in writing prior to study data collection
• Subject aged 18 years or over
• Subject diagnosed with Non-Idiopathic Pulmonary Fibrosis (IPF) Pulmonary Fibrosis (>10% fibrosis on High Resolution Computed Tomography (HRCT) by principal investigator assessment) or IPF as per American Thoracic Society/European Respiratory Society/Japanese Respiratory Society/Asociación Latinoamericana de Tórax (ATS/ERS/JRS/ALAT) Guidelines within the past 12 months
• Forced Vital Capacity (FVC) > 40% predicted at baseline visit
• Life expectancy > 6 months (per assessment of treating physician)

Exclusion criteria

• Current smokers
• Upper Respiratory Tract Infection (URI) or Lower Respiratory Tract Infection (LRTI, including Coronavirus Disease (COVID)-19 infection) within 4 weeks of screening visit
• Airflow obstruction (Forced expiratory volume in one second (FEV1)/FVC < 70%) at baseline or known history of significant spirometry response to bronchodilator
• Cough due to etiology other than Interstitial Lung Disease (ILD) (e.g., allergic rhinitis, Gastroesophageal Reflux Disease (GERD))
• Other respiratory disorders including, but not limited to, a current diagnosis of any obstructive disease including chronic obstructive pulmonary disease (COPD) and asthma, active tuberculosis, lung cancer in treatment or in medical history, sleep apnea, known alpha-1 antitrypsin deficiency, cor pulmonale, clinically significant pulmonary hypertension, clinically significant bronchiectasis, or other active pulmonary diseases.
• Initiation or change in dose or type of anti-tussive medication, angiotensin-converting enzyme (ACE) inhibitors, opiates, and systemic or inhaled (excluding intranasal) corticosteroids in the 4 weeks prior to study entry
• Subject with ILD exacerbation as defined by investigators within 4 weeks prior to study entry
• Subject participating in a clinical study of a systemic or inhaled drug at the time of enrollment
• further exclusion criteria apply

Clinical studies sponsored by Boehringer Ingelheim, phases I to IV, interventional and non interventional, are in scope for sharing of the raw clinical study data and clinical study documents. Exceptions might apply, e.g. studies in products where Boehringer Ingelheim is not the license holder; studies regarding pharmaceutical formulations and associated analytical methods, and studies pertinent to pharmacokinetics using human biomaterials; studies conducted in a single center or targeting rare diseases (in case of low number of patients and therefore limitations with anonymization). For more details refer to: https:// www.mystudywindow.com/msw/datatransparency