Variables

Contact sputum sample

Morning sputum sample

Control n (%)

Case n (%)

p

Control n (%)

Case n (%)

p

Aspect

<0.0001

<0.0001

Salivary

34 (34.0)

9 (9.0)

34 (34.0)

9 (9.0)

Mucopurulent

66 (66.0)

91 (91.0)

66 (66.0)

91 (91.0)

Volume

<0.0001

<0.0001

<3 ml

79 (79.0)

46 (46.0)

79 (79.0)

46 (46.0)

≥3 ml

21 (21.0)

54 (54.0)

21 (21.0)

54 (54.0)