Table 2 Patient characteristics at baseline, comparing those who displayed at least one FoG episode with those who did not, pre-surgery

Age

75 (71–79)

75 (71–78)

78 (76–79)

0.029^a

Female sex

48 (35%)

41 (35%)

7 (32%)

0.77^b

Smoker

16 (12%)

(n = 136)

14 (12%)

(n = 114)

2 (9%)

1.0^d

Diabetes

52 (37%)

40 (34%)

12 (55%)

0.07^b

Parkinsonian syndrome

7 (5.0%)

6 (5.1%)

1 (4.5%)

1.0^d

MMSE*

25 (21–27)

(n = 138)

25 (22–27)

(n = 116)

21 (17–26)

0.031^c

Disease duration (years)

2 (1–3)

(n = 131)

2 (1–3)

(n = 109)

4 (2–5)

< 0.001^c

Maximum walking speed (m/s)

0.83 (0.60–1.10)

(n = 137)

0.87 (0.68–1.10)

(n = 116)

0.57 (0.45–0.73)

(n = 21)

< 0.001^a

Tinetti POMA balance score*

11 (8–13)

11 (9–14)

7 (4–10)

< 0.001^c

Tinetti POMA gait score*

8 (5–10)

8 (6–10)

3 (1–5)

< 0.001^c

Tinetti POMA test total score*

18.0 (13.0–22.0)

20.0 (15.0–23.0)

9.5 (6.0–14.0)

< 0.001^c

TUG Time (seconds)

18.1 (14.3–25.1)

(n = 74)

18.1 (14.3–24.0)

(n = 69)

27.5 (15.3–28.0)

(n = 5)

0.489^c

Shunt surgery

91 (66%)

76 (65%)

15 (68%)

0.77^b

Median follow-up-time (days)

168 (112–247)

(n = 91)

162 (110–244)

(n = 76)

215 (122–265)

(n = 15)

0.33^c

Fazekas grade

2 (2–3)

(n = 123)

2 (2–3)

(n = 106)

2 (1–2)

(n = 17)

0.243^c

Framingham Risk Score

30.7 (20.2–44.5)

(n = 132)

29.6 (20.0-43.2)

(n = 110)

36.5 (21.2–48.9)

0.323^c