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Table 4 The % (n) of subjects reporting symptoms and diagnosed Parkinson's disease, by 10-year age group and for PD cases

From: Self-reported parkinsonian symptoms in the EPIC-Norfolk cohort

Age Group, Years (N)

Excluding individuals with any missing symptom answers

Symptom

40–49 (818)

50–59 (4008)

60–69 (3849)

70–79 (2803)

80+ (61)

All Ages (11 539)

P- value for age trend*

PD Cases (53)

Resting Tremor

3.9 (32)

3.6 (144)

4.3 (166)

5.4 (150)

6.6 (4)

4.3 (496)

0.0008

49.1 (26)

Difficulty Walking

4.7 (38)

5.0 (200)

3.8 (147)

3.9 (110)

6.6 (4)

4.3 (499)

0.0435

35.9 (19)

Difficulty Chair

6.6 (54)

6.4 (255)

5.7 (220)

7.2 (203)

8.2 (5)

6.4 (737)

0.3255

39.6 (21)

Walking Slower

11.3 (92)

19.6 (787)

35.9 (1383)

57.3 (1607)

70.5 (43)

33.9 (3912)

<0.0001

84.9 (45)

Micrographia

5.1 (42)

5.5 (219)

8.7 (336)

16.2 (454)

27.9 (17)

9.3 (1068)

<0.0001

73.6 (39)

Smell less acute

7.7 (63)

7.9 (315)

9.3 (357)

11.4 (319)

13.1 (8)

9.2 (1062)

<0.0001

34.0 (18)

Any of symptoms

25.7 (210)

32.6 (1306)

46.1 (1775)

65.1 (1826)

77.1 (47)

44.8 (5164)

<0.0001

96.2 (51)

Self-reported PD

0.12 (1)

0.35 (14)

0.36 (14)

0.82 (23)

1.64 (1)

0.46 (53)

0.0012

 

Including Missing answers as a separate category

Symptom

40–49 (1342)

50–59 (6341)

60–69 (6063)

70–79 (4608)

80+ (111)

All Ages (18 465)

P- value for age trend*

PD Cases (69)

Resting Tremor

   Yes

3.5 (47)

3.2 (203)

3.7 (224)

4.5 (206)

6.3 (7)

3.7 (687)

0.0026

42.0 (29)

   No

84.8 (1138)

87.1 (5526)

88.8 (5385)

87.9 (4052)

83.8 (93)

87.7 (16194)

 

50.7 (35)

   Missing

11.7 (157)

9.7 (612)

7.5 (454)

7.6 (350)

9.9 (11)

8.6 (1584)

 

7.3 (5)

Difficulty Walking

   Yes

3.4 (46)

4.7 (295)

3.4 (208)

3.4 (157)

6.3 (7)

3.9 (713)

0.0042

33.3 (23)

   No

68.6 (921)

71.5 (4537)

76.4 (4630)

75.2 (3464)

72.1 (80)

73.8 (13632)

 

59.4 (41)

   Missing

28.0 (375)

23.8 (1509)

20.2 (1225)

21.4 (987)

21.6 (24)

22.3 (4120)

 

7.3 (5)

Difficulty Chair

   Yes

5.3 (71)

5.6 (354)

5.2 (312)

6.1 (279)

6.3 (7)

5.5 (1023)

0.6787

37.7 (26)

   No

66.5 (892)

69.5 (4405)

72.9 (4421)

71.2 (3281)

68.5 (76)

70.8 (13075)

 

58.0 (40)

   Missing

28.2 (379)

24.9 (1582)

21.9 (1330)

22.7 (1048)

25.2 (28)

23.7 (4367)

 

4.3 (3)

Walking Slower

   Yes

8.4 (113)

16.1 (1024)

29.5 (1787)

47.0 (2165)

55.9 (62)

27.9 (5151)

<0.0001

82.6 (57)

   No

61.0 (818)

56.7 (3594)

47.2 (2862)

30.7 (1417)

18.0 (20)

47.2 (8711)

 

14.5 (10)

   Missing

30.6 (411)

27.2 (1723)

23.3 (1414)

22.3 (1026)

26.1 (29)

24.9 (4603)

 

2.9 (2)

Micrographia

   Yes

4.6 (62)

4.6 (294)

7.4 (446)

13.1 (604)

21.6 (24)

7.7 (1430)

<0.0001

71.0 (49)

   No

65.2 (875)

69.5 (4406)

70.6 (4283)

65.4 (3012)

54.1 (60)

68.5 (12636)

 

24.6 (17)

   Missing

30.2 (405)

25.9 (1641)

22.0 (1334)

21.5 (992)

24.3 (27)

23.8 (4399)

 

4.4 (3)

Smell less acute

   Yes

5.4 (73)

6.1 (388)

7.4 (450)

8.8 (407)

10.8 (12)

7.2 (1330)

<0.0001

30.4 (21)

   No

61.5 (825)

66.2 (4199)

68.7 (4164)

68.9 (3175)

65. 8 (73)

67.4 (12436)

 

56.5 (39)

   Missing

33.1 (444)

27.7 (1754)

23.9 (1449)

22.3 (1026)

23.4 (26)

25.4 (4699)

 

13.1 (9)

Any of symptoms

   Yes

15.7 (210)

20.6 (1306)

29.3 (1775)

39.6 (1826)

42.3 (47)

28.0 (5164)

<0.0001

73.9 (51)

   No

45.3 (608)

42.6 (2702)

34.2 (2074)

21.2 (977)

12.6 (14)

34.5 (6375)

 

2.9 (2)

   Missing

39.0 (524)

36.8 (2333)

36.5 (2214)

39.2 (1805)

45. 1 (50)

37.5 (6926)

 

23.2 (16)

Self-reported PD

0.07 (1)

0.25 (16)

0.31 (19)

0.69 (32)

0.90 (1)

0.37 (69)

<0.0001

 
  1. *Calculated using chi-square for trend for each individual symptom across the age groups.