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Table 3 Characteristics of Cochrane and non-Cochrane systematic reviews in eyes and vision

From: Authorship diversity among systematic reviews in eyes and vision

  Cochrane systematic reviews Non-Cochrane systematic reviews Total
n (%) n (%) n (%)
Intervention systematic reviews n = 313 n = 313 n = 626
Same first and corresponding author
  Yes 237 (75%) 128 (41%) 365 (58%)
  Noa 76 (25%) 185 (59%) 261 (42%)
All author positionsb
Gender of author (first and corresponding)c n = 237 n = 128 n = 365
  Woman 106 (45%) 52 (41%) 158 (43%)
  Man 125 (53%) 70 (55%) 195 (53%)
  Unknown 6 (2%) 6 (5%) 12 (3%)
Gender of author (first only)d n = 76 n = 185 n = 261
  Woman 40 (53%) 58 (31%) 98 (37%)
  Man 34 (45%) 74 (40%) 108 (41%)
  Unknown 2 (3%) 53 (29%) 55 (21%)
Gender of author (corresponding only)e n = 76 n = 185 n = 261
  Woman 35 (46%) 31 (17%) 66 (25%)
  Man 36 (47%) 117 (63%) 153 (59%)
  Unknown 5 (7%) 37 (20%) 42 (16%)
“Best-case” sensitivity analysis: all unknown author genders are “women”
Gender of author (first and corresponding) n = 237 n = 128 n = 365
  Woman 112 (47%) 58 (45%) 170 (47%)
  Man 125 (53%) 70 (55%) 195 (53%)
Gender of author (first only) n = 76 n = 185 n = 261
  Woman 42 (55%) 111 (60%) 153 (59%)
  Man 34 (45%) 74 (40%) 108 (41%)
Gender of author (corresponding only) n = 76 n = 185 n = 261
  Woman 40 (53%) 68 (37%) 108 (41%)
  Man 36 (47%) 117 (635) 153 (59%)
“Worst-case” sensitivity analysis: all unknown author genders are “men”
Gender of author (first and corresponding) n = 237 n = 128 n = 365
  Woman 106 (45%) 52 (41%) 158 (43%)
  Man 131 (55%) 76 (59%) 207 (57%)
Gender of author (first only) n = 76 n = 185 n = 261
  Woman 40 (53%) 58 (31%) 98 (38%)
  Man 36 (47%) 127 (69%) 163 (62%)
Gender of author (corresponding only) n = 76 n = 185 n = 261
  Woman 35 (46%) 31 (17%) 66 (25%)
  Man 41 (54%) 154 (83%) 195 (75%)
  1. aIf it was unclear whether the first author was also the corresponding author, then the senior (i.e., last) author was considered the corresponding author
  2. bThis section includes all first and corresponding author positions (i.e., the same author may appear multiple times in any of these positions); thus, the total denominator is 887, not 751 (i.e., unique authors)
  3. cTotal denominator = 365 (237 for Cochrane and 128 for non-Cochrane systematic reviews: included only first authors that were also corresponding authors)
  4. dTotal denominator = 261 (76 for Cochrane and 185 for non-Cochrane systematic reviews: included only first authors that were not also corresponding authors)
  5. eTotal denominator = 261 (76 for Cochrane and 185 for non-Cochrane systematic reviews: included only corresponding authors that were not also first authors)