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. Author manuscript; available in PMC: 2012 Mar 14.
Published in final edited form as: J Alzheimers Dis. 2012 Jan 1;29(1):99–108. doi: 10.3233/JAD-2011-111631

Table 5.

Absolute incidence rates and hazard ratios for dementia risk stratified by educational level

Native speakers n-NES Absolute incidence (# events/person-years) Hazard ratio (95% CI)
p valuea
Educational attainment (years) Events Person-years Events Person-years Native speakers n-NES
Low
 (0–11 years)		 31 563 13 292 5.5 4.5 0.75 (0.32–1.76)
0.51
Intermediate
  (12–15 years)		 45 1702 7 368 2.6 1.9 0.57 (0.22–1.45)
0.24
High
  (16–25 years)		 17 969 13 271 1.8 4.8 3.97 (1.62–9.75)
0.003
a

Results are from the full Cox proportional hazards model (Model 3); separate models were run for each education group. Native English speakers were used as the reference group for n-NES.