10.7929/ISSDA/ATIIFD Central Statistics Office (CSO) ISSDA 2025 The Quarterly National Household Survey (QNHS) began in September 1997 and ran until Q2 2017 when it was replaced by the Labour Force Survey (LFS). While the main purpose of the QNHS was the production of quarterly labour force estimates, the QHNS also conducted special modules on different social topics each quarter. This special module was on disability in the workforce. Please note that due to CSO restrictions, these files cannot be matched to their associated microdata files ISSDA