Famaey 1998.

Methods	Open label randomised trial, multicentre; randomisation procedure not described Follow‐up: 4 weeks
Participants	Population and setting: 196 outpatients, 123 female, 73 male Inclusion criteria: people with subacute or chronic low back pain without a specific diagnosis, such as root entrapment syndromes, with at least severe pain at either rest, motion, standing or at night Exclusion criteria: acute LBP; active or previous history of gastric or duodenal ulcers, renal, or hepatic diseases, history of asprin or NSAID intolerance; treatment with corticosteroids.
Interventions	NSAIDs (i): nimesulide 100 mg, b.i.d., 4 weeks (N = 95) Reference treatment (ii): diclofenac sodium 50 mg b.i.d., 4 weeks (N = 101)
Outcomes	Sum of participants with none, mild, moderate / sum of participants with severe, very severe pain at: rest, motion, night, standing. Adverse events.
Notes	1. Only subacute and chronic LBP included; no distinction made; no subgroup analysis of subacute LBP 2. We retrieved an e‐mail address and contacted the author (21 October 2019) to ask for clarification, but we received a message that the address no longer existed. We were unable to find other currently active contact details.