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Table 1 Study-Order sequence assignment matrix

From: Comparison of a novel, endoscopic chest tube insertion technique versus the standard, open technique performed by novice users in a human cadaver model: a randomized, crossover, assessor-blinded study

  Subject
Method (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16)
R 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1
S 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2
R 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3
S 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4
R 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5
S 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
  1. R Reactor technique, S Standard technique; (Numbers) represent individual study participants; Numbers below each labelled study participant in each column represent the order of chest tube insertion (1 = first, 6 = sixth)