With increasing exposure, however, agreement worsened. This effect is shown in the fan-shaped distribution of the data points relative to the coordinate origin. Obviously, the overestimations prevailed. This is Selleck Thiazovivin documented by the negative values of mean in survey t 0 (−112.9 or −64.1 min after excluding eight outliers, respectively) and survey t 1 (−720.1 or −104.4 min after excluding nine outliers, respectively). In both surveys, the limits of agreement including about 95 % of the data (±1.96 SD)

embrace a huge range of data. In survey t 0, these limits range from −646.5 to 420.5 min (or from −304.3 to 176.1 min after excluding eight outliers, respectively), in survey t 1, from −8,535.9 to 7,095.8 min (or from −407.8 to 199.0 min after excluding nine outliers, respectively). Mdm2 inhibitor Fig. 2 Bland–Altman plots for the comparison

of both measurement and Qt 0 (left) and Qt 1 (right), showing knee postures in total [min]; n(t0) = 182, n(t1) = 116 (for better illustration, eight outliers (Qt 0 > 1,000 min) and nine outliers (Qt 1 > 1,000 min), respectively, were excluded) Figure 3 shows Bland–Altman plots for all examined knee postures for the comparison of measurement and questionnaire Qt 0. Except in the case of crawling, the results for all postures can be interpreted in a similar way as the knee postures in total: The means have negative values in all cases, and the limits of agreement show deviations of at least 60 min in both directions (over- and underestimation). Fossariinae On a low exposure level, good agreement between both methods can be stated but with increasing exposure, the deviations increased, as well. Overestimation

predominated for all postures, but underestimation also occurred for all postures except crawling, which was always overestimated. Fig. 3 Bland–Altman plots for the comparison of measurement and Qt 0, showing all examined knee postures [min] (for better illustration, outliers (Qt 0 > 1,000 min) were excluded); sample sizes: knee postures in total (182), unsupported kneeling (189), supported kneeling (189), sitting on heels (190), squatting (190), and crawling (190) Subjects with knee disorders versus subjects without knee disorders A total of 182 of 190 participants in survey t 0 filled out the learn more Nordic questionnaire. Of these, 55 subjects (=30.2 %) reported knee complaints in the last 12 months (group k1), while 127 participants (=68.8 %) reported none (group n1). The comparison of assessment behaviour in the two groups was based on the differences between self-reported and measured durations of knee postures in total in both surveys. The Mann–Whitney U test for two independent samples showed no significant differences between the two groups (medians in groups k1 and n1 were 31.3 and 14.6 min, Mann–Whitney U = 3,026.5, p = 0.153 two tailed).