Congenital PCHI born in district | PCHIs moved in | Late onset PCHI | PCHI in primary school | |
---|---|---|---|---|
Moderate and worse bilateral (≥40 dB HL in BHE) | ||||
Number | 36 | 9 | 9 | 54 |
Prevalence/1000 (95% CI) | 1.01 (0.68 to 1.34) | 0.25 (0.09 to 0.42) | 0.25 (0.09 to 0.42) | 1.51 (1.11 to 1.92) |
Mild bilateral (20–39 dB HL in BHE) | ||||
Number | 35 | 4 | 8 | 47 |
Prevalence/1000 (95% CI) | 0.98 (0.66 to 1.31) | 0.11 (0.0 to 0.22) | 0.22 (0.07 to 0.38) | 1.32 (0.94 to 1.69) |
Unilateral (≥20 dB HL in WHE) | ||||
Number | 19 | 7 | 3 | 29 |
Prevalence/1000 (95% CI) | 0.53 (0.29 to 0.77) | 0.20 (0.05 to 0.34) | 0.08 (0.0 to 0.18) | 0.81 (0.52 to 1.11) |
Total with PCHI | ||||
Number | 90 | 20 | 20 | 130 |
Prevalence/1000 (95% CI) | 2.52 (2.0 to 3.04) | 0.56 (0.32 to 0.81) | 0.56 (0.32 to 0.81) | 3.64 (3.02 to 4.27) |
BHE, better hearing ear; HL, hearing level; PCHI, permanent congenital hearing impairment; WHE, worse hearing ear.