ANA titer (positive 鈮 1:160) and cellular staining patterns were assessed by indirect immunofluorescence (Hep-2 cells). Results Ages ranged from 85 to 98 years, with 58.8% being females. The prevalence of ANA in this population was 61.5%, mostly in lower titers (1:160 in 45.0%, 1:...
but the positive predictive value for rheumatic disease was low.The false-positive rate for any rheumatic disease was 72%in patients 65 years old or younger, and 90%in patients older than 65 years.Even ANAs that were positive at a titer of 1:320 or greater were more likely to be falsely...
The application gives the method to determine the blank value and titer of sodium fluoride by thermometric titration. NaF is used as a titrant in thermometric precipitation titration forming Elapsolith (NaK2AlF6).