Table 2 Intraobserver reliability: proportion of workers (n  =  61) with κ >0.4 by sign or algorithm.

Sign/algorithm	κ>0.4 (proportion)	Median percentage agreement
01‐Pus	96.7	88.0
02‐Redness
Exact	50.8	62.7
Binary*	55.7	81.3
03‐Swelling
Exact	36.1	68.0
Binary*	08.2	89.0
Alg‐04	52.5	78.7
Alg‐05	08.2	94.7
Alg‐06	41.0	86.7
Alg‐07	36.1	90.7
Alg‐08	50.8	84.9
Alg‐09	18.0	97.3
Alg‐10	41.0	88.0

*Ratings of none or mild, and moderate or severe were combined into single values (0 and 1 respectively).

Alg‐04, Redness or swelling (moderate or severe); Alg‐05, redness and swelling (moderate or severe); Alg‐06, pus and (redness or swelling (moderate or severe)); Alg‐07, pus and redness (moderate or severe); Alg‐08, pus and (redness and swelling (any degree)); Alg‐09, pus and (redness and swelling (moderate or severe)); Alg‐10, (pus and moderate redness) or (severe redness).