Table 1. Two-parameter logistic (2PL) IRT constructed brief physical functioning scale (BPFS) item parameters and statistics (N = 1,716)

From

An IRT-constructed Brief Physical Functioning Scale and Its Association with Health Status

Peter D. Hart

American Journal of Public Health Research. 2020, 8(6), 184-189 doi:10.12691/ajphr-8-6-1