Table 5 Comparison of validity measures by worker level (area coordinators versus team leader interviewers).

Sign/algorithm	Sensitivity		Specificity		Positive predictive value		Negative predictive value
	AC	TLI	AC	TLI	AC	TLI	AC	TLI
01‐Pus	0.94	0.90	0.99	0.95	0.98	0.94	0.96	0.92
02‐Redness (binary)*	0.57	0.56	0.99	0.94	0.97	0.86	0.79	0.78
03‐Swelling (binary)*	0.09	0.13	0.99	0.96	0.92	0.71	0.56	0.56
Alg‐04	0.47	0.50	0.99	0.93	0.97	0.89	0.65	0.65
Alg‐05	0.09	0.08	1.00	0.97	0.94	0.58	0.68	0.67
Alg‐06	0.86	0.73	0.99	0.96	0.99	0.94	0.90	0.82
Alg‐07	0.48	0.48	0.99	0.96	0.90	0.66	0.92	0.92
Alg‐08	0.66	0.39	0.98	0.96	0.96	0.89	0.80	0.69
Alg‐09	0.04	0.07	1.00	0.98	0.75	0.36	0.86	0.87
Alg‐10	0.53	0.46	0.98	0.94	0.84	0.63	0.90	0.89

Area coordinators (AC) were responsible for cord examinations during the first six days of life, and team leader interviewers (TLI) conducted subsequent examinations.

*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).