. Author manuscript; available in PMC: 2018 Jun 27.

Published in final edited form as: Biometrics. 2017 Oct 26;74(2):725–733. doi: 10.1111/biom.12809

Table 2.

Comparing low education (< 16 years) and high education (⩾ 16 years) groups

Variable

Low education (n=15)
mean (sd)

High education (n=32)
mean (sd)

Test statistic

p-value

Age Onset

61.8 (10.5)

63.2 (12.9)

t₄₅ = −0.37

0.712

Survival time

8.7 (3.4)

7.9 (3.2)

t₄₅ = 0.80

0.430

Time to study entry

3.4 (1.71)

2.7 (1.5)

t₄₅ = 1.37

0.177

Time to end of study

13.3 (2.8)

12.6 (4.7)

t₄₅ = 0.58

0.563

Male (%)

χ_{1}^{2} = 1.56

0.211

Survival time, time to study entry, and time to end of study are measured in years from AD symptom onset.