xRead - Olfactory Disorders (September 2023)

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PATEL et al.

TABLE VIII.8 (Continued)

Normative data available

Commercially available

Test name and author/s

No. of odors items

Reliability coefficent

Comments

Test type

n-Octanol Absolute and Difference Threshold Tests Rovee et al, 1973 1194

DT DIFFT

1 odor 17 levels

NR

NO

NO

For DT, ascending method of limits for 17 binary concentrations of n-octanol in diethyl phalate Sniff bottles used For DIFF T, 12.5% n-octanol used as standard followed by comparison concentration in ascending and descending trials Sensitive to anxiety based on Taylor Manifest Anxiety Scale (40 college sophomore women selected from 160 on basis of anxiety scores Filter paper strips dipped in bottles containing 8-log-step concentrations Requires hood or other ventilation because of bad smell of some stimuli Ascending method of limits with lowest concentration detected defined as DT and lowest concentration with qualityRT age-corrected, with 5 categories of dysfunction based on men and women aged 18 to 25 years Amyl acetate method of constant stimuli thresholds for 20 men and 20 women No left:right differences found 3 alternative ascending method of limits for each of 3 odorants presented in 125-mL Erlenmeyer flasks at 1-log steps Total of 268 normal patients tested Age but not sex effects observed for thiophene and pyridine, but not phenyl ethanol (Continues) Nonforced-choice Norms not sex- or College-aged students No determination of sex effects Nonorms

T&T Olfactometer Toyota et al, 1978 1195 and Takagi, 1989 1196,1197

DTandRT 5

DT: 0.56-0.71 RT: 0.33-0.45 31 (depends on odorant)

Yes

Yes

Koelega Threshold Test Koelega, 1979 1198

No

No

DT

1 odor 9 concentrations

0.65 bilateral 0.51 right 0.59 left

Ascending Pyridine,

DT

3odors 19 concentrations

NR

No

No

Thiophene and PEA Detection Threshold Tests

Perry et al, 1980 1199