Table 3 Subgroup analyses of the risk of Alzheimer’s disease among control, psoriasis patients treated with or without systemic therapy according to sex, age, presence or absence of diabetes mellitus, hypertension and dyslipidemia.

From: Increased risk of Alzheimer’s disease in patients with psoriasis: a nationwide population-based cohort study

Subgroup

 

Event(n)

Incidence rate (per 1000 person-years)

HR (95%CI)

Model 3

P for interaction

Male

Control

21,680

4.472

1 (Ref.)

0.1987

Psoriasis group

4,913

5.077

1.103 (1.069, 1.137)

No systemic therapy

4,718

5.234

1.112 (1.077, 1.147)

Systemic therapy

195

2.939

0.922 (0.798, 1.058)

Female

Control

28,529

6.889

1 (Ref.)

Psoriasis group

6,398

7.747

1.087 (1.058, 1.117)

No systemic therapy

6,171

7.931

1.088 (1.059, 1.119)

Systemic therapy

227

4.753

1.056 (0.924, 1.2)

40 y < Age < 65 y

Control

4,852

0.743

1 (Ref.)

<0.0001

Psoriasis group

1,333

1.022

1.303 (1.226, 1.385)

No systemic therapy

1,265

1.044

1.32 (1.24, 1.404)

Systemic therapy

68

0.739

1.056 (0.823, 1.33)

Age > 65 y

Control

45,357

18.430

1 (Ref.)

Psoriasis group

9,978

20.386

1.082 (1.058, 1.105)

No systemic therapy

9,624

20.592

1.085 (1.062, 1.109)

Systemic therapy

354

16.038

0.99 (0.89, 1.097)

No DM

Control

39,661

4.899

1 (Ref.)

0.8578

Psoriasis group

8,386

5.377

1.093 (1.067, 1.119)

No systemic therapy

8,082

5.538

1.097 (1.071, 1.124)

Systemic therapy

304

3.035

0.983 (0.877, 1.099)

DM

Control

10,548

11.794

1 (Ref.)

Psoriasis group

2,925

12.491

1.09 (1.046, 1.135)

No systemic therapy

2,807

12.746

1.094 (1.05, 1.141)

Systemic therapy

118

8.462

0.994 (0.824, 1.185)

No HTN

Control

24,495

3.716

1 (Ref.)

0.0043

Psoriasis group

4,989

4.041

1.127 (1.093, 1.161)

No systemic therapy

4,790

4.162

1.133 (1.099, 1.169)

Systemic therapy

199

2.380

0.982 (0.852, 1.126)

HTN

Control

25,714

10.724

1 (Ref.)

Psoriasis group

6,322

11.307

1.069 (1.04, 1.099)

No systemic therapy

6,099

11.538

1.073 (1.043, 1.103)

Systemic therapy

223

7.310

0.984 (0.86, 1.119)

No dyslipidemia

Control

39,940

5.150

1 (Ref.)

0.1967

Psoriasis group

8,340

5.669

1.078 (1.053, 1.104)

No systemic therapy

8,031

5.836

1.083 (1.057, 1.109)

Systemic therapy

309

3.254

0.976 (0.871, 1.09)

Dyslipidemia

Control

10,269

8.325

1 (Ref.)

Psoriasis group

2,971

9.213

1.13 (1.084, 1.177)

No systemic therapy

2,858

9.422

1.135 (1.088, 1.183)

Systemic therapy

113

5.897

1.02 (0.843, 1.222)

  1. Abbreviations: CI, confidence interval; HR, hazard ratio; DM, diabetes mellitus; HTN, hypertension.
  2. Model 3: adjusted by age, sex, income level, diabetes mellitus, hypertension, dyslipidemia and depression.