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Table 2 The occurrence of protocol registration

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

  Number (%)
Site of previous SR/MA protocols register, n = 150 (checklist choice)
 ➣ PROSPERO University of York 107 (71.3)
 ➣ Cochrane Database of SRs (CDSR) 68 (45.3)
 ➣ Campbell Collaboration 4 (2.7)
 ➣ Other 13 (8.7)
Proportion of SR/MA that was registered before starting, n = 267
 ➣ 100% 27 (10.1)
 ➣ 80–100% 21 (7.9)
 ➣ 50–80% 32 (12)
 ➣ 20–50% 27 (10.1)
 ➣ < 20% 42 (15.7)
 ➣ None of them 118 (44.2)
Proportion of SR/MA that was registered, but never come to publish, n = 260
 ➣ 100% 2 (0.8)
 ➣ 80–100% 1 (04)
 ➣ 50–80% 1 (0.4)
 ➣ 20–50% 10 (3.8)
 ➣ < 20% 38 (14.7)
 ➣ None of them 190 (80)
Reason for not publishing registered SR/MA, n = 185 (checklist choice)
 ➣ Have not reached the favorable conclusion 48 (26)
 ➣ Have not finished 129 (69.7)
 ➣ Pressure from sponsor/contractor 18 (9.7)
 ➣ Other 46 (24.9)
Ever conducted SR/MA of basic biomedicine, such as in vivo or in vitro studies? n = 267 43 (16.1)
If yes, did you register the protocol, n = 96
 ➣ Yes 9 (9.4)
Have you been rejected by PROSPERO when submitted a SR/MA protocol in basic biomedicine?, n = 191 3 (1.6)
If yes, What did you do when you got the rejection, n = 18
 ➣ Contact PROSPERO University of York 2 (11.1)
 ➣ Revise and re-submit it to PROSPERO without any contact 0 (0)
 ➣ Other 16 (88.9)
Duration for the PROSPERO to accept protocol?, n = 107
 ➣ 1 to 3 working days 62 (58)
 ➣ 4 to 6 working days 22 (20.6)
 ➣ 1 week to 1 month 22 (20.6)
 ➣ > 1 month 1 (1)
Average duration (in months) from registration to submission of your SR/MA manuscript, mean (SD), n = 115 11.1 (8.1)
Is registration of SR/MA protocol required in your institution?, n = 247
 ➣ Yes 15 (6.1)
 ➣ No 190 (77)
 ➣ Do not know 42 (17)
Are your SR/MA protocols agreed by sponsors?, n = 206
 ➣ Yes 53 (26)
 ➣ No 53 (26)
 ➣ I do not inform the sponsor 100 (48)
Opinion on reason for not registering SR/MA, n = 263 (checklist choice)
 ➣ Submitting protocol takes too much time 86 (32.7)
 ➣ Afraid of others stealing ideas 64 (24.3)
 ➣ Did not know that it should be registered 118 (44.9)
 ➣ Have no idea about the benefit of registering the protocol 92 (35)
 ➣ It is not mandatory 113 (43)
 ➣ Other 30 (11.41)
  1. SR/MA: systematic review meta-analysis