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Table 3 Spearman correlation coefficients and intraclass correlation coefficients between different measurement periods

From: Repeat physical activity measurement by accelerometry among colorectal cancer patients—feasibility and minimal number of days of monitoring

 

First 4 days

ICC, (95% CI)

ρ, p value*

First 7 days

ICC, (95% CI)

ρ, p value*

10 days

ICC, (95% CI)

ρ, p value*

6 months

 First 3 days

0.98, (0.97, 0.99)

0.98*

0.90, (0.84, 0.94)

0.95*

0.84, (0.75, 0.90)

0.95*

 First 4 days

 

0.93, (0.89, 0.96)

0.95*

0.88, (0.81, 0.93)

0.95*

 First 7 days

  

0.98, (0.97, 0.99)

0.99*

12 months

 First 3 days

0.99, (0.98, 0.99)

0.98*

0.94, (0.90, 0.96)

0.95*

0.90, (0.84, 0.94)

0.92*

 First 4 days

 

0.96, (0.93, 0.98)

0.96*

0.93, (0.86, 0.96)

0.94*

 First 7 days

  

0.99, (0.98, 0.99)

0.99*

24 months

 First 3 days

0.96, (0.92, 0.98)

0.96*

0.93, (0.87, 0.96)

0.92*

0.93, (0.87, 0.96)

0.92*

 First 4 days

 

0.96, (0.92, 0.98)

0.96*

0.94, (0.88, 0.97)

0.96*

 First 7 days

  

0.98, (0.96, 0.99)

0.99*

  1. ICC intraclass correlation coefficient, CI confidence interval, ρ Spearman’s correlation coefficient.
  2. * P < 0.0001.
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