Table 2. Summary of publication rates by background characteristics for studies completed before October 2010.
All studiesExcluding studies registered after study completion and with study status unknown
TotalPublishedPTotalPublishedP
n%n%
Total302179591548656
Registration0.0010.96
    Before initiation904550663756
    Between initiation and completion1226654884956
    After completion906876
Study status0.007
    Completed237150631548656
    Unknown652945
Type of test evaluated0.080.14
    Imaging test1257258633860
    Laboratory test834757432047
    Other type of test865867432763
    Multiple test categories82255120
Aim of test evaluated0.290.44
    Diagnostic test276161581407755
    Prognostic test23156512758
    Both diagnostic and prognostic test3310022100
Primary funder0.340.71
    Industry753952492551
    Government85635360
    Other219135621005858
Country0.01a0.40
    US1105752673349
    Canada, Australia, New Zealand2294115747
    European Union, Switzerland926571362467
    Other543769201365
    Multiple categories19115816956
Study duration0.09b0.01c
    0–12 months1055653512039
    13–24 months905359553462
    25 months or more876069432967
Sample size0.72d0.20e
    Below or equal to median1458458814961
    Above median1458760703550
  • a Five studies were excluded from this analysis because country was unknown.

  • b Twenty studies were excluded from this analysis because completion date was unknown.

  • c Five studies were excluded from this analysis because completion date was unknown.

  • d Twelve studies were excluded from this analysis because sample size was not registered; median was 153.

  • e Three studies were excluded from this analysis because sample size was not registered; median was 200.