Other diseases2

No

12

85.7

Yes

2

14.3

Current use of intranasal corticosteroids

No

1

7.1

Yes

12

85.7

Unknown

1

7.1

≥1 peroral corticosteroid course(s) during the past 1 year

No

13

92.9

Yes

0

0.0

Unknown

1

7.1

Previous sinonasal operation(s)

No

11

78.6

Yes

2

14.3

Unknown

1

7.1

Radiological signs in CT scans of previous sinus operation

No

11

78.6

Yes

3

21.4

Total Lund-Mackay score of CT scans

0 - 3

7

50.0

4 - 12

7

50.0

13 - 24

0

0.0

Sinonasal operation performed within a year after the CT scans

No

5

35.7

Yes

8

57.1

Unknown

1

7.1

≥1 sinonasal operation(s) during the 6-year follow-up

No

12

85.7

Yes

1

7.1

Unknown

1

7.1

Number of antibiotic courses during the past 2 years, median (min-max)

6.0

(2 - 15)

Duration of symptoms in years, median (min-max)

2.5

(0.3 - 25.0)

Current symptoms by VAS, mean (min?max)

Sense of smell

3.7

(0.0 - 7.3)

Post-nasal drip

5.5

(1.0 - 8.1)

Obstruction

6.1

(0.7 - 9.8)

Facial pain

5.5

(2.4 - 9.9)