Validation of the NPAQ-short – a brief questionnaire to monitor physical activity and compliance with the WHO recommendations

Table 5 Compliance with WHO’s recommendations on different physical activity measurement methods

		Self-reported
Compliance with WHO’s recommendations	Objectively measured^a n (%)	Open-ended questions^a n (%)	Closed-ended questions^b n (%)	Open-ended questions categorized^c n (%)
No	20 (22)	17 (19)	24 (27)	13 (15)
Yes	72 (78)	72 (81)	65 (73)	76 (85)
Kappa (95% CI)	–	0.42 (0.19;0.65)	0.34 (0.12;0.56)	0.37 (0.14;0.61)
Specificity^d	–	50%	55%	40%
Sensitivity^e	–	90%	81%	93%

WHO’s recommendations on physical activity (> 150 min of MPA or > 75 min of VPA or an equivalent combination). Cohens Kappa (к) with 95% Confidence Interval (CI) for comparison between self-reported measures and the objectively measure. Specificity and sensitivity for self-reported measures compared to the objective measure. n = 89
^aCalculated as a combination of minutes MVPA and VPA (described in Additional file 1)
^bCombining both answers on MVPA and VPA-questions (described in Additional file 1)
^cOpen-ended questions categorized into closed-ended categories
^dSpecificity is the number of participants with PA-levels below the recommendations both measured by self-report and objectively as a percentage of those with PA-levels below according to the objective measure
^eSensitivity is the number of participants with PA-levels above the recommendations both measured by self-report and objectively as a percentage of those with PA-levels above according to the objective measure

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