Interviewer instructions
INTERVIEWER: Demonstrate how to do the lung function test.
INTERVIEWER: Make sure to show the respondent that you are using a clean mouthpiece on the spirometer before starting. Take a short break in between each trial to give the respondent a chance to return to normal breathing.
We will ask you to practice once, then we will have you use it three times. Okay, are you ready? Take a deep breath, seal your lips around the mouthpiece and BLOW, BLOW, BLOW!