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A typesetting error occurred in the first letter in this cluster, by Alejandro R Jadad (16 September, p 746). The P value given in the middle of the penultimate paragraph should read P<0.05 [not P>/=0.05, as published].
Volume and mortality in coronary artery bypass grafting
An authors' error occurred in this letter by Harold S Luft and Jennifer D Parker (11 November, p 1304-5). The y axis in the figure was incorrectly labelled and shows the ratio of observed to expected mortality [not mortality adjusted for risk, as published].
Differences in progression of HIV infection between men and women
Owing to a typesetting error the table was omitted from this letter by Matthias Egger and colleagues (8 April, p 941). The table, which is mentioned in the penultimate paragraph, is reproduced here.
Details of subjects with disseminated cytomegalovirus infection among participants in Swiss HIV
cohort study who were infected by injecting drug use or heterosexual sex and were free of AIDS at
entry to study
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Women (n=998) Men (n=1469) P value
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Characteristics of patients at entry:
No (%) of injecting drug users 534 (54) 1013 (69) <0.001
Mean (SD) age (years) 28.9 (6.6) 31.0 (6.8) <0.001
Mean (SD) CD4 cell count (x106/l) 504
(34) 446 (33) <0.001Disseminated cytomegalovirus disease:
Total No of events 4 12 0.2
No of AIDS defining events 0 5 0.07
Relative rate (95% confidence interval)* 0.57 (0.18 to 1.83) 0.34
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* From Cox regression, including all events; comparing women with men; and adjusting for category of
transmission, age, and CD4 cell count. |