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Table 2 Person days with symptoms in the diary (n = number of expected person days)

From: Particulate matter air pollution and respiratory symptoms in individuals having either asthma or chronic obstructive pulmonary disease: a European multicentre panel study

 

Helsinki

Athens

Amsterdam

Birmingham

 

n = 6480

%

n = 6300

%

n = 6480

%

n = 5220

%

Woken with breathing problems

No

4759

73.4

5334

84.7

4897

75.6

3953

75.7

Yes

978

15.1

667

10.6

958

14.8

808

15.5

Non response

743

11.5

299

4.7

625

9.6

459

8.8

Shortness of breath

No

3987

61.5

4891

77.7

3410

52.6

3111

59.6

Slight symptoms

1774

27.4

1015

16.1

2179

33.6

1443

27.6

Severe symptoms

140

2.2

96

1.5

284

4.4

206

4.0

Non response

579

8.9

298

4.7

607

9.4

460

8.8

Wheeze

No

4932

76.1

4325

68.7

4554

70.3

3182

61.0

Slight symptoms

923

14.2

1627

25.8

1102

17.0

1383

26.5

Severe symptoms

49

0.8

51

0.8

134

2.1

196

3.7

Non response

576

8.9

297

4.7

690

10.6

459

8.8

Cough

No

3418

52.8

4303

68.3

3251

50.1

2189

41.9

Slight symptoms

2305

35.6

1583

25.1

2234

34.5

2026

38.8

Severe symptoms

184

2.8

116

1.9

289

4.5

546

10.5

Non response

573

8.8

298

4.7

706

10.9

459

8.8

Phlegm

No

1973

30.5

3291

52.2

2957

45.6

2087

40.0

Slight symptoms

3462

53.4

2448

38.9

2597

40.1

2137

40.9

Severe symptoms

485

7.5

264

4.2

206

3.2

537

10.3

Non response

560

8.6

297

4.7

720

11.1

459

8.8

Limitation of vigorous activities a

No

3837

59.2

2716

43.1

3714

57.3

2663

51.0

Did activity slowly

1259

19.4

2661

42.2

897

13.8

988

18.9

Avoided activity completely

603

9.3

587

9.3

891

13.8

1113

21.3

Non response

781

12.1

336

5.4

978

15.1

456

8.8

Limitation of moderate activities a

No

3775

58.3

3928

62.3

4237

65.4

3420

65.5

Did activity slowly

2030

31.3

1874

29.8

1266

19.5

1211

23.2

Avoided activity completely

88

1.4

184

2.9

135

2.1

131

2.5

Non response

587

12.0

314

5.0

842

13.0

458

8.8

Limitation of walking a

No

4867

75.1

3455

54.8

4449

68.7

3472

66.5

Did activity slowly

795

12.3

2438

38.7

1132

17.5

1228

23.5

Avoided activity completely

94

1.4

62

1.0

152

2.3

63

1.2

Non response

724

11.2

345

5.5

747

11.5

457

8.8

  1. a due to breathing problems.