TY - JOUR T1 - Sample size calculations for paired or matched ordinal data. JO - Stat Med PY - 1998/07/30 AU - Julious SA AU - Campbell MJ ED - DO - DOI: 10.1002/(sici)1097-0258(19980730)17:14<1635::aid-s VL - 17 IS - 14 SP - 1635 EP - 1642 Y2 - 2025/04/08 ER -