Naseem Cassim1, Lindi M Coetzee1,2, Deborah K Glencross1,2. 1. National Health Laboratory Service, Johannesburg, South Africa. 2. Department of Molecular Medicine and Haematology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
Abstract
BACKGROUND: The South African National Health Laboratory Service provides laboratory services for public sector health facilities, utilising a tiered laboratory model to refer samples for CD4 testing from 255 source laboratories into 43 testing laboratories. OBJECTIVE: The aim of this study was to determine the impact of distance on inter-laboratory referral time for public sector testing in South Africa in 2018. METHODS: A retrospective cross-sectional study design analysed CD4 testing inter-laboratory turn-around time (TAT) data for 2018, that is laboratory-to-laboratory TAT from registration at the source to referral receipt at the testing laboratory. Google Maps was used to calculate inter-laboratory distances and travel times. Distances were categorised into four buckets, with the median and 75th percentile reported. Wilcoxon scores were used to assess significant differences in laboratory-to-laboratory TAT across the four distance categories. RESULTS: CD4 referrals from off-site source laboratories comprised 49% (n = 1 390 510) of national reporting. A positively skewed distribution of laboratory-to-laboratory TAT was noted, with a median travel time of 11 h (interquartile range: 7-17), within the stipulated 12 h target. Inter-laboratory distance categories of less than 100 km, 101-200 km, 201-300 km and more than 300 km (p < 0.0001) had 75th percentiles of 8 h, 17 h, 14 h and 27 h. CONCLUSION: Variability in inter-laboratory TAT was noted for all inter-laboratory distances, especially those exceeding 300 km. The correlation between distance and laboratory-to-laboratory TAT suggests that interventions are required for distant laboratories.
BACKGROUND: The South African National Health Laboratory Service provides laboratory services for public sector health facilities, utilising a tiered laboratory model to refer samples for CD4 testing from 255 source laboratories into 43 testing laboratories. OBJECTIVE: The aim of this study was to determine the impact of distance on inter-laboratory referral time for public sector testing in South Africa in 2018. METHODS: A retrospective cross-sectional study design analysed CD4 testing inter-laboratory turn-around time (TAT) data for 2018, that is laboratory-to-laboratory TAT from registration at the source to referral receipt at the testing laboratory. Google Maps was used to calculate inter-laboratory distances and travel times. Distances were categorised into four buckets, with the median and 75th percentile reported. Wilcoxon scores were used to assess significant differences in laboratory-to-laboratory TAT across the four distance categories. RESULTS: CD4 referrals from off-site source laboratories comprised 49% (n = 1 390 510) of national reporting. A positively skewed distribution of laboratory-to-laboratory TAT was noted, with a median travel time of 11 h (interquartile range: 7-17), within the stipulated 12 h target. Inter-laboratory distance categories of less than 100 km, 101-200 km, 201-300 km and more than 300 km (p < 0.0001) had 75th percentiles of 8 h, 17 h, 14 h and 27 h. CONCLUSION: Variability in inter-laboratory TAT was noted for all inter-laboratory distances, especially those exceeding 300 km. The correlation between distance and laboratory-to-laboratory TAT suggests that interventions are required for distant laboratories.
Authors: Mamsallah Faal; Nicolette Naidoo; Deborah K Glencross; Willem D F Venter; Regina Osih Journal: J Acquir Immune Defic Syndr Date: 2011-11-01 Impact factor: 3.731
Authors: Sergio Carmona; Jacob Bor; Cornelius Nattey; Brendan Maughan-Brown; Mhairi Maskew; Matthew P Fox; Deborah K Glencross; Nathan Ford; William B MacLeod Journal: Clin Infect Dis Date: 2018-03-04 Impact factor: 20.999