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Table 1 Demographic and professional characteristic of participants

From: Protocol registration issues of systematic review and meta-analysis studies: a survey of global researchers

  Number (%)
Age, mean (SD), n = 249 45.2 (11.6)
Men, n = 266 172 (64.7)
Country, n = 262
 ➣ USA 47 (18)
 ➣ UK 32 (12.2)
 ➣ Italy 23 (8.7)
 ➣ Netherlands 16 (6.1)
 ➣ Canada 16 (6.1)
 ➣ Australia 15 (5.7)
 ➣ Brazil 12 (4.6)
 ➣ Others –each country less than all mentioned above – 101 (38.6)
Continent, n = 262
 ➣ WHO Eastern Mediterranean Region 12 (4.6)
 ➣ WHO European Region 136 (52)
 ➣ WHO African Region 2 (0.8)
 ➣ WHO Region of the Americas 75 (28.6)
 ➣ WHO South-East Asia Region 8 (3.1)
 ➣ WHO Western Pacific Region 29 (11.1)
Years of experience in SR/MA, mean (SD), n = 265 9.2 (6.3)
Main research interest of SR/MA, n = 264
 ➣ Clinical trial 130 (49.2)
 ➣ Epidemiology 43 (16.2)
 ➣ Diagnostic accuracy 18 (6.8)
 ➣ Basic science (such as in vitro study) 14 (5.3)
 ➣ Genetic association 9 (3.4)
 ➣ Other 50 (18.9)
Number of publications in SR/MA, mean (SD), n = 263 15.1 (52.2)
  N (%)
 ➣ 1–10 190 (72.2)
 ➣ 10–50 63 (24)
 ➣ 50–100 7 (2.7)
 ➣  > 100 3 (1.1)
Highest Impact Factor Journal of your publications in SR/MA, n = 267
 ➣ 0–2 36 (13.6)
 ➣ 2–5 84 (31.5)
 ➣ 5–10 76 (28.5)
 ➣ 10–20 30 (11.4)
 ➣ > 20 15 (5.6)
 ➣ Do not know 26 (9.7)
  1. SD: standard deviation, SR/MA: systematic review/meta-analysis