Routine development of objectively derived search strategies

Table 2 Text words after analysis with the Text Mining Package in R (extract)

Terms	Frequency development set	Frequency population set	Sensitivity development set	Sensitivity population set
Patients	25	1,419	1.0000	0.1976
Results	25	1,425	1.0000	0.1985
Cancer	24	361	0.9600	0.0503
Methods	24	335	0.9600	0.0467
Prostate	24	49	0.9600	0.0068
Treatment	21	941	0.8400	0.1311
External	20	86	0.8000	0.0120
Therapy	20	342	0.8000	0.0476
Treated	20	371	0.8000	0.0517
Beam	19	32	0.7600	0.0045
Brachytherapy	19	4	0.7600	0.0006
Compared	17	972	0.6800	0.1354
Conclusions	17	41	0.6800	0.0057
Follow	16	49	0.6400	0.0068
Prostatectomy	16	11	0.6400	0.0015
Radical	16	52	0.6400	0.0072
Respectively	16	72	0.6400	0.0100
Risk	16	584	0.6400	0.0813
Specific	16	488	0.6400	0.0680
Localized	15	66	0.6000	0.0092
Months	15	259	0.6000	0.0361
Purpose	15	192	0.6000	0.0267
Radiation	15	68	0.6000	0.0095
Analysis	14	853	0.5600	0.1188
Radiotherapy	14	30	0.5600	0.0042
Rates	14	260	0.5600	0.0362
Score	14	115	0.5600	0.0160
Significantly	14	873	0.5600	0.1216
Biochemical	13	87	0.5200	0.0121
Gleason	13	4	0.5200	0.0006
Materials	13	162	0.5200	0.0226
Antigen	12	76	0.4800	0.0106
Time	12	576	0.4800	0.0802
Using	12	1,680	0.4800	0.2340

ISSN: 2046-4053