GURKIRPAL SINGH, M.B.B.S., M.D.; RANJIT KUMAR CHANDRA, M.D.
To the editor: Kremer and associates (1) could have obtained more convincing results with some alterations in their study design. The more sensitive visual analogue scale should have been used to measure pain in preference to the five-point scale. Moreover, there are several advantages in measuring pain relief directly. When pain is measured on two occasions and the second reading is subtracted from the first, the difference is always proportional to the first reading or the initial severity of pain. Also, when pain scores are subtracted, it is assumed that differences in different parts of the scale are equal; that
SINGH G, CHANDRA RK. Fish Oils in Rheumatoid Arthritis. Ann Intern Med. ;108:904–905. doi: 10.7326/0003-4819-108-6-904_2
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Published: Ann Intern Med. 1988;108(6):904-905.
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