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Table 1 Demography of the cases and controls

From: Factors associated with uptake of influenza vaccine in people aged 50 to 64 years in Hong Kong: a case–control study

 

Case (n = 193)

Control (n = 411)

Crude odd ratio (OR)

No.

%

No.

%

OR

95 % CI

p-value*

Average age (mean year) ± SD**

57.3 ± 4.8

56.3 ± 4.4

-

-

-

Sex

Male

73

37.8

159

38.7

1

ref***

 

ref

 

Female

120

62.2

252

61.3

1.04

0.73

1.48

0.84

Age group

50 - 54

59

30.6

176

42.8

1

ref

ref

 

55 - 59

63

32.6

119

29.0

1.58

1.03

2.41

0.04

 

60 - 64

71

36.8

116

28.2

1.83

1.20

2.77

0.005

Ethnic

Chinese

193

100.0

410

99.8

-

-

-

Education

Primary or below

58

30.1

110

26.8

1

ref

ref

 

Secondary

120

62.2

260

63.9

0.88

0.60

1.29

0.50

 

Tertiary or above

15

7.8

37

9.1

0.77

0.39

1.52

0.46

Status

Retired

52

26.9

69

16.8

-

-

-

 

Housewife

47

24.4

112

27.3

-

-

-

Employed

Yes

83

43.0

198

48.2

0.82

0.58

1.15

0.24

 

No

110

57.0

213

51.8

1

ref

ref

Current smoker

Yes

16

8.3

20

4.9

1.77

0.89

3.49

0.11

 

No

177

91.7

391

95.1

1

ref

ref

  1. *p-value is the value of crude OR when compared to reference
  2. **standard deviation
  3. ***ref is reference