Table 4

Correlation of daily activity cards and research observations

Category (no. of subjects)No. of minutesKappa statistic (SE) [% agreement]
TaskEnvironmentNo. of workers
*Other trades included labourer, sheet metal worker, sprinkler fitter, and operating engineer.
All subjects (17)47750.67 (0.01) [69]0.70 (0.01) [83]0.24 (0.01) [58]
Carpenters (8)28730.64 (0.01) [72]0.71 (0.02) [88]0.13 (0.01) [49]
Electricians (5)12310.64 (0.01) [70]0.67 (0.02) [78]0.41 (0.02) [69]
Other trades* (4)6710.51 (0.01) [53]0.51 (0.03) [71]0.49 (0.03) [72]