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Table 2 Patient grouping according to ARP vs. actual administration method

From: Matching actual treatment with patient administration-route-preference improves analgesic response among acute low back pain patients—a randomized prospective trial

 Administration route preference
PO (n = 21)IM (n = 17)
Actual administration methodPO (n = 13)A (prefer PO, received PO, n = 9)B (prefer IM, received PO, n = 4)
IM (n = 25)C (prefer PO, received IM, n = 12)D (prefer IM, received IM, n = 13)