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Table 5 The minimum days reliability between the time blocks

From: Determining minimum number of valid days for accurate estimation of sedentary behaviour and awake-time movement behaviours using the ActivPAL3 in nursing home residents

Variable

Time block

First day

First two days

Minimum days to achieve ICC of 0.80

Minimum days to achieve ICC of 0.90

ICC

ICC

P value

Awaking hours (h)

Midday

.754

.860

.311

2

3

Midnight

.747

.852

.511

2

3

Standing duration (h) 

Midday

.956

.978

.294

1

1

Midnight

.929

.963

.550

1

1

% time awake standing

Midday

.942

.970

.260

1

1

Midnight

.931

.964

.945

1

1

Walking duration (h)

Midday

.910

.953

.480

1

1

Midnight

.925

.961

.556

1

1

% time awake walking

Midday

.906

.951

.377

1

1

Midnight

.908

.952

.749

1

1

Absolute time upright (h)

Midday

.963

.981

.451

1

1

Midnight

.944

.971

.462

1

1

% time awake upright

Midday

.956

.978

.418

1

1

Midnight

.948

.973

.862

1

1

Number of sit to stand transitions

Midday

.918

.957

.073

1

1

Midnight

.923

.960

.872

1

1

Absolute time in SB (h)

Midday

.797

.887

.198

2

3

Midnight

.821

.901

.843

1

2

% time awake in SB

Midday

.956

.978

.418

1

1

Midnight

.973

.973

.862

1

1

Number of SB bouts < 30 min

Midday

.908

.952

.169

1

2

Midnight

.916

.956

1.000

1

2

Absolute time spent in bouts < 30 min (h)

Midday

.864

.927

.696

1

2

Midnight

.887

.940

.631

1

2

% time awake in bouts < 30 min

Midday

.829

.906

.644

1

2

Midnight

.852

.920

.575

1

2

Number of SB bouts between 30–60 min

Midday

.695

.820

.042*

2

4

Midnight

.785

.880

.268

2

3

Absolute time spent in bouts 30–60 min

Midday

.707

.828

.037*

2

4

Midnight

.787

.881

.210

2

3

% time awake in bouts between 30–60 min

Midday

.659

.795

.040*

3

4

Midnight

.761

.864

.435

2

3

Number of SB bouts between > 60 min

Midday

.487

.655

.714

4

 > 6

Midnight

.457

.628

.777

4

 > 6

Absolute time spent in bouts > 60 min

Midday

.865

.928

.613

1

2

Midnight

.892

.943

.717

1

2

% of time awake in bouts between > 60 min

Midday

.918

.957

.163

1

1

Midnight

.926

.961

.799

1

1

Average duration of SB bouts (min)

Midday

.774

.873

.060

2

3

Midnight

.870

.930

.318

1

2

  1. ICC Intra-class correlation coefficient, Midnight Midnight time block, Midday Midday time block, h Hours, min Minutes, % Percentage
  2. * Statistically significant (p < 0.05)