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Table 3 Intraclass correlation and % observer agreement by area and context characteristics

From: Use of SOPARC to assess physical activity in parks: do race/ethnicity, contextual conditions, and settings of the target area, affect reliability?

  

ICC

Agreement

Adjusted agreementb

N

ICC

95CI

%

Pa

B

P

95CI

Average people counted

    

< 0.001

   

  < = 5.00

1445

0.636

0.604; 0.666

81.2

 

Ref

–

–

 5.01–15.00

1645

0.638

0.609; 0.666

53.8

 

0.230

< 0.001

0.10; 0.28

 15.01+

300

0.706

0.644; 0.758

53.7

 

0.243

< 0.001

0.18; 0.32

Day of week

     

0.426

   

 Weekday

2528

0.895

0.887; 0.902

65.3

 

Ref

–

–

 Weekend

862

0.948

0.94; 0.954

65.8

 

1.101

0.297

0.92;1.32

Time of day

    

< 0.001

   

 10-11 am

240

0.521

0.423; 0.608

46.0

 

Ref

–

–

 3 pm–4 pm

1011

0.953

0.947; 0.958

71.4

 

3.976

< 0.001

2.89; 5.47

 4.30–5.30 pm

668

0.901

0.885; 0.914

65.6

 

3.093

< 0.001

2.22; 4.30

 6-7 pm

1471

0.948

0.942; 0.953

65.4

 

3.452

< 0.001

2.53; 4.71

Round

    

0.452

   

 1

1011

0.927

0.918; 0.935

63.7

 

Ref

–

–

 2

995

0.913

0.902; 0.923

67.1

 

1.122

0.050

1; 1.49

 3

875

0.924

0.914; 0.933

65.6

 

1.137

0.219

0.93; 1.39

 4

509

0.878

0.857; 0.897

65.4

 

1.205

0.139

0.94; 1.54

Formally organized

    

0.149

   

 N

3338

0.919

0.914; 0.924

65.6

 

Ref

–

–

 Y

52

0.644

0.454; 0.779

57.7

 

1.663

0.093

0.92; 3.01

Informally organized

    

0.228

   

 N

2689

0.917

0.911; 0.923

65.8

 

Ref

–

–

 Y

701

0.899

0.884; 0.912

64.2

 

0.173

0.224

0.90; 1.52

Shade cover

    

0.032

   

 None

999

0.932

0.924; 0.94

64.0

 

Ref

–

–

 Some

1285

0.914

0.905; 0.923

68.3

 

1.149

0.143

0.95; 1.39

 Complete

1014

0.904

0.892; 0.915

63.8

 

1.174

0.146

0.95; 1.46

Target area

    

< 0.001

   

 Basketball

809

0.810

0.785; 0.832

61.6

 

Ref

–

–

 Baseball/Handball

379

0.904

0.884; 0.921

69.4

 

0.918

0.560

0.69; 1.23

 Playground

1120

0.938

0.93; 0.945

61.6

 

0.916

0.512

0.70; 1.19

 Swings

508

0.929

0.916; 0.94

77.8

 

2.043

< 0.001

1.49;2.80

 Water

237

0.945

0.929; 0.957

67.5

 

0.912

0.626

0.63;1.32

 Other

337

0.951

0.94; 0.96

63.2

 

0.924

0.629

0.67;1.28

Total

3390

0.915

0.909; 0.92

65.5

    
  1. aPearson chi-square test of association between % agreement and area characteristic
  2. bLogistic regression coefficients representing odds of achieving agreement per type of observation