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Table 1 Comparison of linguistic variables and readability level across different conclusiveness categories

From: Conclusiveness, linguistic characteristics and readability of Cochrane plain language summaries of intervention reviews: a cross-sectional study

  Conclusiveness Md (95% CI) P*
Positive (n = 229) Positive inconclusive (n = 768) No evidence (n = 438) No opinion (n = 1301) Negative (n = 146) Negative inconclusive (n = 308) Unclear (n = 1012) Equal (n = 50) Equal inconclusive (n = 108)
SMOG index 14.8 (14.4 to 14.9) 15.0 (14.8 to 15.1) 15.1 (14.8 to 15.2) 14.9 (14.7 to 15.0) 15.0 (14.8 to 15.4) 14.9 (14.6 to 15.2) 14.9 (14.7 to 14.9) 15.5 (15.0 to 15.7) 15.0 (14.5 to 15.5) 0.403
Analytic 95.4 (94.7 to 96.1) 95.2 (95.0 to 95.4) 94.4 (93.9 to 94.9)b 94.6 (94.5 to 95.1) 94.6 (93.5 to 95.4) 95.7 (95.2 to 96.1) 94.8 (94.5 to 95.2) 96.1 (93.4 to 96.9) 96.0 (95.5 to 96.7) < 0.001
Clout 57.2 (54.4 to 59.6)c 55.7 (54.7 to 56.7) c 55.7 (54.0 to 57.0) c 53.5 (52.6 to 54.5) c 50.0 (46.1 to 50.0) 53.4 (52.0 to 55.2) c 54.2 (53.3 to 55.4) c 48.1 (43.3 to 51.4) 49.7 (47.0 to 51.8) < 0.001
Authentic 23.6 (21.5 to 25.9) 27.5 (25.8 to 28.9) 21.1 (19.0 to 22.6) d 28.0 (26.6 to 29.1) 24.3 (19.8 to 29.2) 27.7 (25.6 to 29.0) 26.6 (25.2 to 27.8) 26.6 (20.5 to 33.6) 28.7 (25.5 to 33.8) < 0.001
Tone 19.6 (14.5 to 25.8) 18.0 (15.7 to 20.6) 25.8 (17.1 to 25.8)e 17.1 (15.6 to 19.0) 16.7 (13.4 to 19.8) 15.6 (13.3 to 18.2) 18.1 (16.6 to 20.5) 15.6 (7.96 to 25.8) 17.9 (15.1 to 21.2) 0.004
Word count 260 (229 to 297) 365 (346 to 378)a 220 (204 to 232) 364 (349 to 375) a 208 (186 to 230) 298 (278 to 312) 369 (352 to 379) a 296 (218 to 336) 356 (326 to 399)a < 0.001
  1. Md Median, CI Confidence interval, SMOG Simple Measure of Gobbledygook
  2. *Kruskal Wallis nonparametric test with Dunn post hoc comparison
  3. a Significantly different from “No evidence” and “Negative” and “Equal” categories
  4. b Significantly different from “Positive”, “Negative” and “Equal inconclusive” categories
  5. c Significantly different from “Negative”, “Equal” and “Equal inconclusive” categories
  6. d Significantly different from “Positive inconclusive”, “No opinion”, “Negative inconclusive”, “Unclear” and “Equal inconclusive”
  7. e Significantly different from “Negative” and “Negative inconclusive”