Skip to main content

Table 3 Age- and sex-specific number needed to treat to prevent one death in 5 and 10 years

From: Number of natural teeth, denture use and mortality in Chinese elderly: a population-based prospective cohort study

 5-year mortality rate in non-denture users10-year mortality rate in non-denture usersHR[95% CI] of denture users versus non-denture usersNNT[95% CI] to prevent one death in 5 yearsNNT[95% CI] to prevent one death in 10 years
65–79 years & men19.8%44.7%0.64[0.55, 0.74]6.4[4.7, 9.7]6.6[5.1, 9.6]
80–89 years & men56.1%85.7%0.69[0.62, 0.78]9.1[7.2, 12.9]24.0[19.1, 33.4]
> = 90 years & men82.4%97.9%0.83[0.75, 0.92]36.7[24.6, 79.6]287.3[193.7, 617.8]
65–79 years & women16.7%36.7%0.66[0.56, 0.78]7.3[5, 12.6]6.8[5.0, 11.2]
80–89 years & women48.9%81.5%0.79[0.70, 0.90]12.8[8.5, 27.2]28.3[19.4, 58.5]
> = 90 years & women82.1%97.7%0.85[0.79, 0.93]41.5[28.3, 82.9]300[205.7, 595.5]
  1. HR Hazard ratio, CI Confidence interval, NNT Number needed to treat
  2. HRs were based on fully-adjusted cox regression models