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Table 2 Comparisons for hearing threshold changes of SNHL and CHL ear by frequency during follow-up period (N = 78)

From: Comparisons of hearing threshold changes in male workers with unilateral conductive hearing loss exposed to workplace noise: a retrospective cohort study for 8 years

  SNHL ear (ΔS)a (dBHL) CHL ear (ΔC)b (dBHL) Difference between ΔS and ΔC (dBHL)
kHz Mean SDc Mean SDc Mean SDc p *
0.5 7.9 9.7 8.7 10.6 −0.8 8.0 0.389
1 10.3 10.1 11.2 10.7 −1.0 9.8 0.378
2 9.9 10.2 10.5 8.8 −0.6 9.6 0.604
3 9.4 10.2 7.8 9.4 1.6 9.8 0.164
4 8.9 8.5 5.6 9.3 3.2 10.2 0.006
6 4.7 12.0 4.0 10.6 0.7 13.2 0.638
  1. a ΔS, b ΔC, * p-value was calculated by paired t-test; a ΔS, difference of SNHL ear (2013-2006), p < 0.05; b ΔC, difference of CHL ear (2013-2006), p < 0.05; SDc, standard deviation