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Table 1 Characteristics of the study population

From: Obesity and risk of respiratory tract infections: results of an infection-diary based cohort study

 

All (N = 1455):

Male (N = 524):

Female (N = 931):

 

Variable

Category

Absolute number

Relative frequency (%)

Absolute number

Relative frequency (%)

Absolute number

Relative frequency (%)

P-valued (gender)

BMI

< 18.5

30

2.1

4

0.76

26

2.8

< 0.001

18.5–25

786

54.0

226

43.1

560

60.1

 

25–30

452

31.1

219

41.8

233

25.0

 

30–35

135

9.3

58

11.1

77

8.3

 

35–40

34

2.3

9

1.7

25

2.7

 

≥40

18

1.2

8

1.5

10

1.1

 

missing

0

 

0

 

0

  

Age (years)

< 30

140

9.6

24

4.6

116

12.5

< 0.001

30–40

170

11.7

39

7.4

131

14.1

 

40–50

367

25.2

110

21.0

257

27.6

 

50–60

403

27.7

162

30.9

241

25.9

 

≥60

375

25.8

189

36.1

186

20.0

 

Educational level

none

4

0.28

1

0.19

3

0.32

< 0.001

Hauptschulea

287

19.8

141

27.0

146

15.8

 

Realschule/Mittlere Reifeb

470

32.4

122

23.3

348

37.5

 

Abiturc

261

18.0

66

12.6

195

21.0

 

university degree

428

29.5

193

36.9

235

25.4

 

missing

5

 

1

 

4

  

Smoking status

never

789

54.3

248

47.4

541

58.1

< 0.001

former smoker

461

10.0

190

39.0

271

9.1

 

current smoker

204

31.7

85

36.3

119

29.1

 

missing

1

 

1

 

0

  

Contact with children

never

162

11.2

73

14.0

89

9.6

< 0.001

rarely

574

39.5

236

45.1

338

36.4

 

weekly

292

20.1

90

17.2

202

21.7

 

daily

424

29.2

124

23.7

300

32.3

 

missing

3

 

1

 

2

  

Co-morbidities:

 COPD/Lung emphysema

yes

35

2.4

23

4.4

12

1.3

< 0.001

missing

10

 

3

 

7

  

 Asthma

yes

89

6.2

32

6.1

57

6.2

1.000

missing

14

 

3

 

11

  

 Renal disease

yes

16

1.1

9

1.7

7

0.76

0.116

missing

13

 

3

 

10

  

 Blood disease

yes

21

1.5

7

1.4

14

1.5

1.000

missing

13

 

6

 

7

  

 Liver disease

yes

55

3.8

27

5.2

28

3.0

0.046

missing

13

 

2

 

11

  

 Rheumatoid disease

yes

52

3.6

14

2.7

38

4.1

0.187

missing

14

 

6

 

8

  

 Chronic intestinal disease

yes

45

3.1

19

3.6

26

2.8

0.431

missing

11

 

3

 

8

  

 Diabetes mellitus

yes

46

3.2

23

4.4

23

2.5

0.060

missing

13

 

4

 

9

  
  1. aSecondary general school, represents 9 years of school education; bIntermediate secondary school, represents 10 years of school education;cGeneral Higher Education Entrance Qualification, represents 12–13 years of school education; d the p-value for the gender difference is based on the Fisher’s exact test for comorbidities and on chi2 otherwise
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BMC Public Health

ISSN: 1471-2458

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