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Table 1 Demographics of PD participants with cortical brain tissues and blood samples

From: Genome-wide epigenetic analyses in Japanese immigrant plantation workers with Parkinson’s disease and exposure to organochlorines reveal possible involvement of glial genes and pathways involved in neurotoxicity

Group

Grouped by exposure

Grouped by OGCs

Exposure 10+ years (n = 4)

Exposure 0 years (n = 13)

OGCs 4+ (n = 4)

OGCs 0–2 (n = 12)

Mean ± SD

Range

Mean ± SD

Range

Mean ± SD

Range

Mean ± SD

Range

Years of education

8

8–8

11.8 ± 3.3

7–17

12.8 ± 4.3

7–17

9.5 ± 2.1

7–12

Last CASI score

41.6 ± 22.8

18.6–66.9

67.9 ± 24.4

0–90

53.5 ± 37.6

0–86

58.6 ± 24.4

18.5–90

Age at death (years)

88.8 ± 1.3

87–90

85.1 ± 3.9

79–91

84.5 ± 2.5

82–88

87.7 ± 3.4

81–92

Age at blood draw (years)

84.5 ± 1.7

82–86

80.6 ± 3.4

74–86

80.0 ± 3.6

76–83

83.4 ± 4.0

77–91

Plantation exposure (years)

23.2 ± 11.0

15–38

0

0

0.5 ± 1.0

0–2

6.1 ± 11.5

0–38

OGC exposure (n)

2.0 ± 0.8

1–3

2.5 ± 1.2

0–4

4.3 ± 0.5

4–5

1.7 ± 0.7

0–2

Post mortem interval (hrs)

11.8 ± 5.9

5.3–18.7

20.7 ± 21.1

4.2–65.5

7.4 ± 5.0

4.2–14.8

16.8 ± 16.3

4.9–65.6

Braak PD stage

5.8 ± 0.43

5–6

5.7 ± 0.46

5–6

6.0 ± 0.0

6

3.5 ± 0.5

5–6