Table 5. Statistical methods published in 1990, 2000, and 2010 △ .
| Total | Article Year 1990(n = 223) | Article Year 2000(n = 314) | Article Year 2010(n = 301) | χ 2 | P * | |
|---|---|---|---|---|---|---|
| Descriptive statistics # | 838(100.0%) | 223(100.0%) | 314(100.0%) | 301(100.0%) | — | — |
| Chi-square | 275(32.8%) | 83(37.1%) | 97(30.9%) | 95(31.6%) | 5.236 | 0.062 |
| Fisher exact | 92(11.0%) | 22(10.0%) | 38(12.0%) | 32(10.6%) | 1.707 | 0.426 |
| Mantel-Haenszel | 80(9.5%) | 4(2.0%) | 26(8.3%) | 49(16.3%) | 2.252 | 0.260 |
| T-test | 304(36.3%) | 78(35.0%) | 114(36.3%) | 112(37.2%) | 1.345 | 0.520 |
| ANOVA ★ | 394(47.0%) | 110(49.3%) | 148(47.1%) | 136(45.2%) | 5.636 | 0.060 |
| Interim analysis | 53(6.3%) | 6(2.5%) | 19(6.2%) | 28(9.3%) | 9.515 | 0.009 |
| Correlation analysis | 226(27.0%) | 40(17.9%) | 75(23.9%) | 111(36.9%) | 25.755 | <0.001 |
| Simple linear regression | 196(23.4%) | 35(15.7%) | 65(20.7%) | 96(31.9%) | 20.784 | <0.001 |
| Multiple comparison | 63(7.5%) | 12(5.6%) | 20(6.3%) | 31(10.2%) | 5.409 | 0.047 |
| Non-parametric test | 235(28.0%) | 52(23.1%) | 104(33.2%) | 79(26.2%) | 6.961 | 0.031 |
| Wilcoxon test | 117(14.0%) | 27(12.3%) | 43(13.6%) | 47(15.6%) | 1.341 | 0.511 |
| Logistic regression | 128(15.3%) | 27(12.3%) | 49(15.6%) | 52(17.3%) | 7.686 | 0.021 |
| Survival analysis | 239(28.5%) | 34(15.3%) | 74(23.6%) | 131(43.4%) | 56.279 | <0.001 |
| Cox models | 134(16.0%) | 17(7.7%) | 43(13.6%) | 74(24.6%) | 29.404 | <0.001 |
| Kaplan Meier | 117(13.9%) | 8(3.6%) | 37(11.7%) | 72(23.9%) | 46.070 | <0.001 |
| Sensitivity analysis | 29(3.5%) | 3(1.3%) | 10(3.3%) | 16(5.3%) | 6.159 | 0.046 |
| Transformation | 103(12.3%) | 16(7.2%) | 28(8.8%) | 59(19.6%) | 23.651 | <0.001 |
| Correction analysis for covariates | 158(18.8%) | 19(8.3%) | 64(20.3%) | 76(25.1%) | 23.966 | <0.001 |
| Confidence Interval | ||||||
| Difference | 249(29.7%) | 101(45.3%) | 84(26.8%) | 64(21.3%) | 37.524 | <0.001 |
| Superiority | 210(25.1%) | 33(14.8%) | 85(27.1%) | 92(30.6%) | 18.037 | <0.001 |
| Non-inferiority | 138(16.5%) | 18(8.1%) | 65(20.7%) | 55(18.3%) | 16.230 | <0.001 |
| Equality | 27(3.2%) | 5(2.2%) | 10(3.2%) | 12(4.0%) | 1.253 | 0.242 |
*Chi-square test for differences among years.
△Excludes statistics in which there were n<15 across all three years of review.
#Including: means, standard variation, median, percentages.etc.
★Including repeated measurement analysis.