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Table 3 Comparison of clinical characteristics according to APOE genotype in elderly patients with schizophrenia

From: Low prevalence of lipid metabolism abnormalities in APOE ε2-genotype and male patients 60 years or older with schizophrenia

Item

 

APOE ε2(n = 40)

APOE ε3(n = 205)

APOE ε4(n = 49)

x 2 /F

P-value

Men (%)

 

23 (57.5%)

109 (53.2%)

26 (53.1%)

0.263

0.877

Age (years)

 

67.65 ± 7.17

67.10 ± 6.54

68.00 ± 6.58

0.422

0.656

Overweight status (%)

 

18 (45.0%)

98 (47.8%)

21 (42.9%)

0.437

0.804

History of disease

Diabetes (%)

11 (27.5%)

52 (25.4%)

12 (24.5%)

0.112

0.945

High blood pressure (%)

11 (27.5%)

78 (38.0%)

19 (38.8%)

1.708

0.426

Drug use*

Atypical antipsychotic use (%)

36 (90.0%)

179 (87.3%)

45 (91.8%)

 

0.751#

Chlorpromazine equivalent dose (mg)

322.88 ± 320.06

318.52 ± 254.79

361.98 ± 371.20

0.459

0.490

Lipid-lowering mediation use (%)

1 (2.5%)

6 (2.9%)

7 (14.3%)

 

0.006#

Glucose-lowering medication use (%)

9 (22.5%)

43 (21.0%)

12 (24.5%)

0.296

0.863

Serum biochemical indices&

Triglycerides (mmol/L)

1.35 ± 0.81

1.38 ± 0.84

1.43 ± 0.80

0.062

0.940

Cholesterol (mmol/L)

4.38 ± 0.91

4.74 ± 0.91

4.94 ± 1.47

2.994

0.052

High-density lipoprotein (mmol/L)

1.36 ± 0.35

1.29 ± 0.41

1.25 ± 0.45

0.812

0.445

Low-density lipoprotein (mmol/L)

2.34 ± 0.63

2.83 ± 0.75

2.85 ± 0.98

7.038

0.001

Plasma glucose (mmol/L)

5.58 ± 1.40

5.50 ± 1.49

5.27 ± 0.89

1.198

0.303

  1. Note: APOE genotypes were divided into three groups: an APOE ε2 group (ε2/ε2 and ε2/ε3), an APOE ε3 group (ε3/ε3), and an APOE ε4 group (ε3/ε4 and ε4/ε4)
  2. #: Fisher’s Exact Test
  3. *: Different antipsychotics were converted to chlorpromazine equivalent doses
  4. &: Plasma glucose was compared among the three groups with glucose-lowering medication use as a covariate. Serum lipids were compared among the three groups with lipid-lowering medication use as a covariate