Table 4 Sensitivity analysis—estimated relative risk (RR) for the risk of dropout for participants in North America

Partner type^a

0.595

0.53

 Spouse

720

268

13

1

–

1

–

 Adult child

171

69

6

1.13 (0.86, 1.48)

0.374

0.81 (0.49, 1.36)

0.427

 Other

80

32

0

1.12 (0.78, 1.62)

0.532

1.06 (0.66, 1.72)

0.802

Participant age (per 10 years)

971

369

19

1.47 (1.30, 1.66)

< .001

1.47 (1.23, 1.75)

< .001

Education (years)

971

369

19

0.95 (0.92, 0.98)

0.001

0.97 (0.93, 1.00)

0.034

Partner age (per 10 years)

971

369

19

1.12 (1.02, 1.23)

0.021

0.97 (0.82, 1.14)

0.699

 Mini-Mental State Exam

971

369

19

0.94 (0.91, 0.97)

< .001

0.94 (0.91, 0.97)

< .001

 Hachinski Score

971

369

19

1.12 (1.00, 1.26)

0.049

1.04 (0.92, 1.19)

0.513

 Geriatric Depression Scale

971

369

19

1.08 (1.01, 1.15)

0.035

1.08 (1.01, 1.16)

0.031

 Female

504

188

8

1

–

1

–

 Male

467

181

11

1.02 (0.83, 1.26)

0.821

1.02 (0.73, 1.42)

0.903

 Female

600

239

13

1

–

1

–

 Male

371

130

6

0.86 (0.69, 1.06)

0.162

0.88 (0.64, 1.23)

0.469

 No

649

270

13

1

–

1

–

 Yes

322

99

6

0.69 (0.54, 0.86)

0.001

0.75 (0.57, 0.99)

0.046

 No

318

127

7

1

–

1

–

 Yes

653

242

12

0.88 (0.71, 1.10)

0.263

0.96 (0.76, 1.22)

0.76

 White

922

346

16

1

–

1

–

 Asian

13

6

0

1.13 (0.54, 2.38)

0.741

1.15 (0.50, 2.63)

0.743

 Hispanic

16

8

3

1.30 (0.65, 2.60)

0.452

1.07 (0.52, 2.19)

0.861

 African American/Black

20

9

0

1.43 (0.70, 2.93)

0.325

1.18 (0.52, 2.68)

0.69