The prevalence rate (per 10 000 children) of hearing impairment in urban areas by age in Taiwan
| Year | <3 years | 3–5 years | 6–11 years | 12–14 years | 15–17 years | 0–17 years | ||||||||||||
| N | Prev.* | (95% CI) | N | Prev. | (95% CI) | N | Prev. | (95% CI) | N | Prev. | (95% CI) | N | Prev. | (95% CI) | N | Prev. | (95% CI) | |
| 2004 | 104 | 2.24 | (1.85 to 2.71) | 364 | 6.14 | (5.54 to 6.81) | 989 | 7.37 | (6.92 to 7.84) | 621 | 8.96 | (8.29 to 9.70) | 751 | 11.17 | (10.40 to 12.00) | 2829 | 7.51 | (7.24 to 7.80) |
| 2005 | 111 | 2.52 | (2.10 to 3.04) | 334 | 5.90 | (5.30 to 6.56) | 1013 | 7.71 | (7.25 to 8.20) | 610 | 8.88 | (8.20 to 9.61) | 767 | 11.05 | (10.29 to 11.86) | 2835 | 7.66 | (7.38 to 7.95) |
| 2006 | 140 | 3.26 | (2.76 to 3.85) | 326 | 6.38 | (5.73 to 7.12) | 998 | 7.65 | (7.19 to 8.14) | 639 | 9.25 | (8.56 to 10.00) | 734 | 10.80 | (10.04 to 11.61) | 2837 | 7.85 | (7.57 to 8.14) |
| 2007 | 138 | 3.24 | (2.75 to 3.83) | 325 | 6.69 | (6.00 to 7.46) | 957 | 7.62 | (7.15 to 8.12) | 629 | 9.05 | (8.37 to 9.78) | 709 | 10.30 | (9.57 to 11.09) | 2758 | 7.77 | (7.48 to 8.06) |
| 2008 | 132 | 3.10 | (2.62 to 3.68) | 315 | 6.82 | (6.11 to 7.62) | 907 | 7.54 | (7.07 to 8.05) | 600 | 8.66 | (8.00 to 9.38) | 643 | 9.43 | (8.73 to 10.19) | 2597 | 7.50 | (7.21 to 7.79) |
| 2009 | 147 | 3.50 | (2.98 to 4.12) | 283 | 6.28 | (5.59 to 7.05) | 889 | 7.84 | (7.34 to 8.37) | 567 | 8.18 | (7.53 to 8.88) | 652 | 9.52 | (8.82 to 10.28) | 2538 | 7.50 | (7.22 to 7.80) |
| 2010 | 159 | 4.01 | (3.43 to 4.68) | 293 | 6.55 | (5.84 to 7.35) | 853 | 7.74 | (7.24 to 8.28) | 536 | 8.22 | (7.55 to 8.95) | 635 | 9.21 | (8.52 to 9.96) | 2476 | 7.53 | (7.24 to 7.84) |
*Prev., the prevalence, estimated by dividing the number of cases by the population in each age group in each year.