Table 3.

Inter-rater agreement of the ranking of four exposures (grouped into quintiles) and level of agreement ^a

Exposure	Weighted kappa			Level of agreement
	Mean	Min	Max	Fair (number)	Moderate (number)	Substantial (number)
Standing/walking	0.41	0.34	0.52	6	4	0
Kneeling/squatting	0.36	0.30	0.41	8	2	0
Total load lifted	0.49	0.34	0.63	1	8	1
Frequency of lifting loads weighing ≥20 kg	0.38	0.29	0.43	7	3	0

^a)Poor (below 0.0), slight (0.00-0.20), fair (0.21-0.40), moderate (0.41-0.60), substantial (0.61-0.80), almost perfect (0.81-1.00) [40].

Ten pair-wise comparisons between five raters for each exposure.