Table 2

Incidence rates of anterior cruciate ligament rupture per 1000 person years across ages for men and women in the Swedish Twin Register

MenWomen
Person yearsN*Rate (95% CI)Person yearsN*Rate (95% CI)
18–20 years60 1971392.31 (1.96 to 2.73)65 8601792.71 (2.35 to 3.15)
20–40 years239 8002921.22 (1.09 to 1.37)276 4002600.94 (0.83 to 1.06)
40–60 years340 3001680.49 (0.42 to 0.57)379 6002030.53 (0.47 to 0.61)
>60 years271 300740.27 (0.22 to 0.34)353 000800.23 (0.18 to 0.28)
  • *Number of incident cases of anterior cruciate ligament rupture.