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Table 3 Correlations between metabolic equivalents (METs) derived from performance tests on day of intake, self-reported disability and from accelerometers among adults with RA (n = 35)

From: Validity of the Nurses’ health study physical activity questionnaire in estimating physical activity in adults with rheumatoid arthritis

Variables

Correlation Strength

95% Confidence Limits

NHSPAQ METs

 With accelerometer METs

0.48

0.15–0.70

 With modified step-test METs

0.50

0.18–0.72

 With disability (MDHAQ)

−0.24

−0.54–0.12

Actigraph accelerometer METs

 With modified step-test METs

0.39

0.05–0.64

 With walk-test speed

−0.50

−0.71–-0.19

 With disability (MDHAQ)

−0.21

−0.51–0.15