Table 2

Risk of dementia in people with CP (n=1703) compared with age, sex and GP practice-matched controls (n=5109)

Events nEvents %Person-years in 1000sIncidence per 1000 person-years (95% CI)Model 1 HR (95% CI) and p valueModel 2 HR (95% CI) and p valueModel 3 HR (95% CI) and p value
No CP531.0456.660.00094 (0.0007 to 0.0012)1 (reference)1 (reference)1 (reference)
CP191.1214.570.00130 (0.0008 to 0.0020)2.69 (1.44 to 5.00), p=0.0021.92 (0.92 to 4.02), p=0.081.76 (0.73 to 4.25), p=0.21
  • Model 1: unadjusted.

  • Model 2: adjusted for baseline (ie, predementia) ID, sensory impairments and epilepsy.

  • Model 3: adjusted for model 2 plus baseline (ie, predementia) diagnosis of diabetes, heart disease, stroke, depression and average annual GP visits.

  • CP, cerebral palsy; GP, general practice; ID, intellectual disability.