Table 3.

Test-retest reliability ^* of the Workplace Sitting Breaks Questionnaire (SITBRQ)

Questionnaire item	Spearman’s rho (95% CI) †	Cohen’s kappa (95% CI) ‡	% correctly classified (95% CI) §	% in same or adjacent category (95% CI) ||	% highly misclassified (95% CI) ¶
Frequency of breaks (breaks/hour)	0.71 (0.59 - 0.79)	0.74 (0.64 - 0.84)	51.0 (41.0 - 61.0)	85.4 (78.4 - 92.5)	14.6 (7.5 - 21.6)
Total duration of breaks (minutes/day)	0.59 (0.45 - 0.71)	0.61 (0.38 - 0.85)	46.9 (36.9 - 56.9)	79.2 (71.0 - 87.3)	20.8 (12.7 - 29)

^*Test and retest surveys were conducted a maximum of 14 days apart.

^†Spearman’s rank correlation between test and retest and its 95% confidence interval.

^‡Quadratic weighted Cohen’s kappa coefficient of agreement between test and retest and its 95% confidence interval.

^§Percent of participants classified in same categories in test and retest its 95% confidence interval.

^||Percent of participants classified in same or adjacent categories in test and retest its 95% confidence interval.

^¶Percent of participants classified in distant categories in test and retest (two or more categories apart) its 95% confidence interval.