Evaluation of the SPP-II test

Blue-yellow deficiency in workers exposed to low concentrations of organic solvents

“…When the classi®cation of Marre et al (1991) was applied the dierences between the groups were less pronounced (Table 3). Logistic regression models did not reveal an association between the in¯uencing variables age, duration of exposure, day of the week, education, consumption of alcohol, and pack-years and the target variables CCI, number of (real) errors made on the SPP2 test, and the classi®cation of the SPP2 test according to Marre et al (1991). The lack of association may be attributable to the small sample size n 24.…”

“…This symbol was misread by almost all observers with normal color vision (Pinckers et al 1985). According to Marre et al (1991) we counted the possible errors of blue-yellow type as well. A possible error means that the left ®gure of plate 5, 6, 8, or 9 is less well recognized than the right one when both ®gures are read correctly.…”

“…Marre et al (1991) reported a value of u 0X65 when they tested both healthy subjects and patients with diseased eyes. Thus, the dierent coecients re¯ect dierences in the selection of test subjects.…”