Previous taxonomies, or systems of categorization, used the terms "classic transsexual" or "true transsexual," terms once used in differential diagnoses. Blanchard also said homosexual transsexuals were comparatively shorter and lighter in proportion to their height than non-homosexuals. Independent research done by Johnson and Smith concurs with most of Blanchard's observations. Smith did not find a significant difference in height-weight ratio. Subsequent research has found only partial support of Smith's findings. Johnson's 1990 work used the alternative term "androphilic transsexual", Johnson wrote that there was a correlation between social adjustment to the new gender role and androphilia.