The rural-to-urban prevalence rate ratio of hearing impairment by age in Taiwan
| Year | <3 years | 3–5 years | 6–11 years | 12–14 years | 15–17 years | 0–17 years | ||||||
| Rate ratio | (95% CI) | Rate ratio | (95% CI) | Rate ratio | (95% CI) | Rate ratio | (95% CI) | Rate ratio | (95% CI) | Rate ratio | (95% CI) | |
| 2004 | 1.03 | (0.74 to 1.45) | 1.02 | (0.85 to 1.23) | 1.09 | (0.98 to 1.22) | 1.02 | (0.88 to 1.18) | 1.07 | (0.95 to 1.22) | 1.05 | (0.98 to 1.12) |
| 2005 | 0.96 | (0.69 to 1.35) | 1.05 | (0.86 to 1.27) | 0.99 | (0.88 to 1.11) | 1.10 | (0.95 to 1.26) | 0.98 | (0.86 to 1.12) | 1.01 | (0.94 to 1.08) |
| 2006 | 1.13 | (0.85 to 1.50) | 1.10 | (0.90 to 1.33) | 1.05 | (0.94 to 1.18) | 1.01 | (0.87 to 1.16) | 0.99 | (0.87 to 1.13) | 1.03 | (0.96 to 1.10) |
| 2007 | 1.51 | (1.16 to 1.97)* | 0.88 | (0.72 to 1.09) | 1.10 | (0.98 to 1.23) | 1.00 | (0.86 to 1.16) | 0.95 | (0.83 to 1.09) | 1.03 | (0.96 to 1.10) |
| 2008 | 1.26 | (0.94 to 1.69) | 1.09 | (0.89 to 1.33) | 1.07 | (0.95 to 1.21) | 1.04 | (0.89 to 1.20) | 1.07 | (0.93 to 1.23) | 1.08 | (1.00 to 1.15)* |
| 2009 | 1.16 | (0.87 to 1.55) | 1.15 | (0.93 to 1.41) | 1.06 | (0.94 to 1.20) | 1.13 | (0.97 to 1.31) | 1.05 | (0.91 to 1.21) | 1.09 | (1.02 to 1.17)* |
| 2010 | 0.98 | (0.73 to 1.32) | 1.18 | (0.96 to 1.45) | 1.04 | (0.92 to 1.18) | 1.09 | (0.94 to 1.27) | 1.05 | (0.92 to 1.21) | 1.07 | (1.00 to 1.15) |
*P<0.05.