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Table 3 Different characteristics of the BHFTA among the subjects (n = 32,121)

From: A risk model and nomogram for high-frequency hearing loss in noise-exposed workers

Variable

BHFTA [n (%)]

P *

<25a

25–39

40–79 b

≥80c

 

Sex

    

< 0.001

 Female

5957 (70.41)

2160 (25.53)

332 (3.92)

11 (0.13)

 

 Male

13,995 (59.15)

6777 (28.64)

2809 (11.87)

80 (0.34)

 

Age (years)

    

< 0.001

  < 25

1443 (75.63)

428 (22.43)

37 (1.94)

0 (0.00)

 

 25–29

3044 (72.63)

1001 (23.88)

145 (3.46)

1 (0.02)

 

 30–34

2691 (69.21)

991 (25.49)

204 (5.25)

2 (0.05)

 

 35–39

2824 (61.94)

1292 (28.34)

432 (9.48)

11 (0.24)

 

 40–44

5257 (59.28)

2615 (29.49)

966 (10.89)

30 (0.34)

 

  ≥ 45

4693 (53.90)

2610 (29.98)

1357 (15.59)

47 (0.54)

 

NED (years)

    

< 0.001

 0–4

8937 (66.15)

3564 (26.38)

990 (7.33)

20 (0.15)

 

 5–9

5217 (64.11)

2148 (26.4)

754 (9.27)

18 (0.22)

 

 10–14

2177 (58.18)

1079 (28.83)

469 (12.53)

17 (0.45)

 

 15–19

1156 (57.63)

576 (28.71)

264 (13.16)

10 (0.50)

 

 20–24

1508 (54.34)

898 (32.36)

362 (13.05)

7 (0.25)

 

 25–29

699 (48.51)

517 (35.88)

215 (14.92)

10 (0.69)

 

  ≥ 30

258 (50.69)

155 (30.45)

87 (17.09)

9 (1.77)

 

Industry type

    

< 0.001

 Manufacturing

14,901 (63.97)

6178 (26.52)

2168 (9.31)

48 (0.21)

 

 Construction

107 (36.39)

147 (50.00)

39 (13.27)

1 (0.34)

 

 Mining

1448 (43.34)

1284 (38.43)

582 (17.42)

27 (0.81)

 

 Others

3496 (67.35)

1328 (25.58)

352 (6.78)

15 (0.29)

 

Enterprise type

    

< 0.001

 SOE

5433 (56.24)

3328 (34.45)

880 (9.11)

20 (0.21)

 

 FOE

1626 (66.48)

659 (26.94)

160 (6.54)

1 (0.04)

 

 POE

12,893 (64.42)

4950 (24.73)

2101 (10.5)

70 (0.35)

 
  1. Abbreviations: BHFTA binaural high-frequency threshold average, NED noise exposure duration, FOE foreign-owned enterprise, SOE state-owned enterprise, POE private-owned enterprise
  2. Footnote. a BHFTA ≤25 dB, defined as a normal hearing level; b BHFTA ≥40 dB, defined as the cut-off point for HFHL; c BHFTA ≥80 dB, defined as severe HFHL
  3. * P-value was analysed by the chi-square test, with significance defined at < 0.05