RT Journal A1 Fontanarosa PB, Weintraub MI T1 ARe magnets effective for pain control? JF JAMA JO JAMA YR 2000 FD August 2 VO 284 IS 5 SP 564 OP 566 DO 10.1001/jama.284.5.561 UL http://dx.doi.org/10.1001/jama.284.5.561 AB To the Editor: The study by Dr Collacott and colleagues1 contains sex bias and selection bias; 19 of 20 subjects (95%) were men, 11 of 20 (55%) were disabled, and 6 of 20 (85%) were retired. It is possible that many such patients would deny improvement from any therapy, to protect disability or monthly benefit claims. It is also inappropriate to include a diagnosis of fibromyalgia, which is controversial and not accepted by the majority of US physicians. 2 The statement implying that pain was caused by spondylosis is not scientifically acceptable because all patients at mean age 60 years display degenerative bone disease, which is generally asymptomatic.