Table 2 Quality of life, medication, use of walking aids, social contact, and ActiGraph data stratified on CDR, mean (SD)

Quality of life

18.86 (6.41)

14.89 (3.74)

0.022

21.94 (6.22)

16.66 (4.37)

<0.001

26.95 (6.94)

18.67 (5.82)

0.009

Walking aids (%)

57.1

47.9

.265

70.6

25.5

<0.001

70.3

33.3

0.004

Social contact weekly (%)

42.9

97.9

<0.001

81.8

90.4

0.004

74.3

80.0

0.058

Sleep patterns

Sleep during night-time (%)

76.68 (16.54)

79.43 (11.52)

0.579

76.77 (15.51)

79.22 (12.84)

0.453

75.95 (14.68)

86.86 (3.76)

0.111

Total sleep time in minutes

322.04 (69.45)

333.61 (48.37)

0.579

322.41 (65.16)

333.07 (53.96)

0.438

318.99 (61.64)

364.81 (15.77)

0.111

WASO*** (minutes)

92.84 (68.17)

75.71 (37.94)

0.323

89.75 (59.95)

75.02 (48.94)

0.242

93.84 (57.87)

53.47 (16.90)

0.135

Wake > 5 min

4.61 (2.78)

4.31 (1.74)

0.694

4.88 (2.61)

4.16 (2.50)

0.229

4.49 (3.04)

3.20 (1.83)

0.363

Activity pattern

Sedentary (%)

41.44 (21.17)

43.01 (14.27)

0.800

47.63 (16.67)

43.71 (15.14)

0.281

58.06 (20.76)

48.2 (15.52)

0.317

Light (%)

52.55 (17.95)

50.26 (10.8)

0.634

49.74 (14.21)

50.12 (12.17)

0.900

40.62 (19.58)

49.15 (14.35)

0.357

Moderate (%)

6.01 (7.8)

6.73 (6.8)

0.797

2.63 (4.72)

6.17 (5.36)

0.003

1.32 (2.08)

2.65 (2.05)

0.191

Light exposure (lux av. counts)

93.49 (102.91)

142.55 (211.55)

0.551

39.12 (44.39)

171.84 (275.17)

0.010

37.28 (36.63)

300.15 (328.12)

<0.001

Psychotropic medication

1.17 (0.98)

0.54 (0.61)

0.042

1.17 (1.09)

0.32 (0.60)

<0.001

1.06 (0.88)

0.40 (0.89)

0.126