Davoli 1989.

Methods	RCT; randomisation procedure not described Follow‐up: 7 days. Outcome measurements at baseline and after 7 days
Participants	Population: 30 participants, 26 women and 4 men, mean age 62 years, range 45 to 80 years Inclusion criteria: acute or recurrent low back pain, with or without radiation, degree of pain at least 2 on a 5‐point scale Exclusion criteria: pregnant or lactating women, gastroduodenal ulcer, depression, severe hepatic, renal or cardiovascular insufficiency (or both), severe alterations of blood chemistry, hypersensitivity or intolerance to piroxicam, aspirin, or other NSAIDS, use of NSAIDs or corticosteroids in previous 30 days
Interventions	NSAID (i): etodolac 200 mg bid, 7 days (N = 15) NSAID (ii): piroxicam‐beta‐cyclodextrin one 20 mg tablet, 7 days (N = 15)
Outcomes	Pain, adverse events
Notes	1. Both acute and recurrent LBP included, no distinction made 2. We were unable to find contact details to ask for clarification (21 October 2019)