Course of the schizophrenia nuclear symptoms subscale, the schizotypal symptoms subscale and the depression subscale of the SCL-90-R in the Zurich Study, 1979–1999, i.e., ages 20/21 through 40/41. Note: The standard deviations are 0.54, 0.48, 0.34, 0.36, 0.33, 0.29 (schizophrenia nuclear symptoms subscale); 0.69, 0.63, 0.58, 0.55, 0.56, 0.57 (schizotypal symptoms subscale); 0.71, 0.65, 0.65, 0.62, 0.65, 0.64 (depression subscale)