Table 1.

Characteristics of 125 reviewers randomised to remain anonymous (control) and 125 randomised to be identified (intervention). Values are numbers (percentages) unless stated otherwise

Characteristic	Anonymous reviewers	Identified reviewers
Mean (SD) age (years)	51.1 (9.0) (n=120)	51.2 (8.4) (n=120)
Place of residence:
United Kingdom	106/124 (85)	106/123 (86)
North America	8/124 (6)	6/123 (5)
Other	10/124 (8)	11/123 (9)
Postgraduate training in epidemiology or statistics	67/120 (56)	62/119 (52)
Involved in medical research	103/120 (86)	103/121 (85)

Totals less than 125 are because of missing data.