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Table 2 Proportion of links identified by varying time-based linkage rule regarding hospital admission time, relative to ED visit

From: Patient-specific record linkage between emergency department and hospital admission data for a cohort of people who inject drugs: methodological considerations for frequent presenters

Link Description Number of links (N = 1190) Percentage
L1 Hospital admission time equal to ED arrival time 206 17%
L2 Hospital admission time equal to ED departure time 7 1%
L3 Hospital admission at some point within ED stay 801 67%
L4 Hospital admission and discharge before ED departure 21 2%
L5 Hospital admission ≤24 h after ED departure 43 4%
L6 Hospital admission ≤24 h prior to ED arrivala 112 9%
  1. aWhere ED arrival must occur before hospital separation