Sensitivity of Swedish interactive threshold algorithm compared with standard full threshold algorithm in Humphrey visual field testing.
OBJECTIVE
To compare the sensitivity of Swedish interactive threshold algorithm (SITA) strategies with the standard full threshold algorithm in the Humphrey Field Analyzer.


METHODS
Observational case series.


METHODS
Forty-eight glaucoma patients who were experienced in automated perimetry.


METHODS
Central field testing was performed with the 30-2 program using standard full threshold (SFT), SITA standard (SS), and SITA fast (SF) strategies. All three tests were carried out on each of four different days in a span of 4 weeks.


METHODS
Sensitivity, repeatability, time saved, and the extent of defect in the SITA strategies were compared with those of the SFT.


RESULTS
The sensitivity of SS and SF were 95.12% and 92.68%, respectively. The time saved in SS and SF was 53.12+/-9.51% and 70.69+/-8.81%, respectively. The repeatability as assessed by intraclass correlation showed excellent repeatability for the SFT and SS strategies and excellent to poor repeatability with the SF strategy. With increasing mean deviation, the defects (significant at P<0.5%) in the pattern deviation plots tended to be more in the SITA strategies as compared with SFT.


CONCLUSIONS
Swedish interactive threshold algorithm strategies have good sensitivity and are significantly faster as compared with the standard threshold algorithm. The repeatability of the SFT and SS strategies are excellent, whereas that of the SF strategy is variable.
Sekhar
G C
GC
L.V. Prasad Eye Institute, Hyderabad, India. gcs@lvpeye.stph.net
Naduvilath
T J
TJ
Lakkai
M
M
Jayakumar
A J
AJ
Pandi
G T
GT
Mandal
A K
AK
Honavar
S G
SG
D000465:Algorithms; D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D009412:Nerve Fibers / Q000473:pathology; D015203:Reproducibility of Results; D012165:Retinal Ganglion Cells / Q000473:pathology; D012680:Sensitivity and Specificity; D013548:Sweden; D014786:Vision Disorders / Q000175:diagnosis*; D058609:Visual Field Tests / Q000592:standards*; D014794:Visual Fields