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Table 2 Comparison of the PIN3 physical activity questionnaire to the diary card using Spearman correlation coefficients (SCC) with 95% confidence intervals (CI)

From: Measuring physical activity among pregnant women using a structured one-week recall questionnaire: evidence for validity and reliability

Comparison Variables* Diary Card (n = 177)
SCC (95% CI)
Questionnaire using perceived intensity (hours/week)  
   Total physical activity 0.67 (0.57, 0.76)
   Moderate activity 0.63 (0.52, 0.73)
   Vigorous activity 0.68 (0.56, 0.79)
   Moderate to vigorous activity 0.66 (0.56, 0.76)
Questionnaire using absolute intensity (MET-hours/week)  
   Total physical activity 0.63 (0.53, 0.73)
   Moderate intensity defined as 3-6 METS  
   Moderate activity 0.62 (0.52, 0.73)
   Vigorous activity 0.53 (0.39, 0.67)
   Moderate to vigorous activity 0.60 (0.49, 0.70)
   Moderate intensity defined as 4.8-7.1 METS  
   Moderate activity 0.61 (0.49, 0.74)
   Vigorous activity 0.47 (0.29, 0.64)
   Moderate to vigorous activity 0.69 (0.58, 0.80)
  1. * The diary card and questionnaire variables compared to each other were intended to assess the same intensities of physical activity.