Table 5 Subgroup analysis by age for the associations between the prevalence of hypertension and occupational exposure status and classification of occupational noise exposure combined with BHFTA

Occupational noise status

0.019

18–29

 Non–exposed

1

1

 Exposed

1.97

1.64,2.39

< 0.001

1.90

1.58,2.30

< 0.001

30–39

 Non–exposed

1

1

 Exposed

1.57

1.41,1.75

< 0.001

1.50

1.34,1.68

< 0.001

40–49

 Non–exposed

1

1

 Exposed

1.42

1.32,1.54

< 0.001

1.45

1.34,1.58

< 0.001

50–60

 Non–exposed

1

1

 Exposed

1.44

1.30,1.60

< 0.001

1.44

1.30,1.60

< 0.001

Classification of occupational noise exposure combined with BHFTA

< 0.001

18–29

 Occupational noise non–exposed

 with BHFTA normal

1

1

 Occupational noise exposed

 with BHFTA normal

1.94

1.62,2.35

< 0.001

1.87

1.56,2.27

< 0.001

 Occupational noise exposed

 with BHFTA elevated

2.57

2.11,3.15

< 0.001

2.32

1.91,2.86

< 0.001

30–39

 Occupational noise non–exposed

 with BHFTA normal

1

1

 Occupational noise exposed

 with BHFTA normal

1.53

1.37,1.71

< 0.001

1.48

1.32,1.65

< 0.001

 Occupational noise exposed

 with BHFTA elevated

1.94

1.73,2.19

< 0.001

1.70

1.51,1.91

< 0.001

40–49

 Occupational noise non–exposed

 with BHFTA normal

1

1

 Occupational noise exposed

 with BHFTA normal

1.39

1.28,1.51

< 0.001

1.44

1.33,1.56

< 0.001

 Occupational noise exposed

 with BHFTA elevated

1.62

1.49,1.76

< 0.001

1.56

1.43,1.70

< 0.001

50–60

 Occupational noise non–exposed

 with BHFTA normal

1

1

 Occupational noise exposed

 with BHFTA normal

1.42

1.29,1.58

< 0.001

1.43

1.29,1.59

< 0.001

 Occupational noise exposed

 with BHFTA elevated

1.51

1.36,1.69

< 0.001

1.49

1.34,1.67

< 0.001