Table 2. Errors made by the algorithm in random samples of titles and abstracts, the number of times that error was made, the average error percentage, and the estimated upper limit.

Error	Count	Average error (%)	Upper limit on error (%)
Wrongly excluded whole title	1	0.3	1.6
Missed valid acronym from title	7	1.2	2.2
Wrongly included acronym from title	5	0.8	1.7
Missed valid acronym from abstract	19	6.3	9.1
Wrongly included acronym from abstract	2	0.7	2.1