Table 2 Daily questions in the digital health diary

How was your day (worse than normal, normal, better than normal)?

Have you been outside your home today (less than normal, normal, more than normal)?

How many meals have you had today (two to three, five, more than five)?

Did you have breathing problems today (worse than normal, normal, better than normal)?

Have you been bothered by coughing today (worse than normal, normal, better than normal)?

Amount of sputum^a (less than normal, normal, more than normal)?

Colour of sputum^a (clear, coloured)?