Table 1 Classification of research types, methods, statistical methods, and research contents
Research type | N (%) | |
|---|---|---|
Original articles | 461 (63.3) | |
Review articles | 109 (15.0) | |
Case reports | 158 (21.7) | |
Research method | N (% of 619) | |
Case-control study | 261 (42.2) | |
Case series | 178 (28.7) | |
Case report | 158 (25.5) | |
Experimental study | 21 (3.4) | |
Cohort study | 1 (0.2) | |
Randomized controlled trials | 0 (0.0) | |
Statistical method | N (% of 558*) | |
Descriptive statistics | 284 (50.9) | |
Mean analysis | 211 (37.8) | |
Categorical data analysis | 49 (8.8) | |
Analysis of variance (ANOVA) | 1 (0.2) | |
Regression analysis | 7 (1.3) | |
Artificial neural networks | 6 (1.1) | |
Research content | N (% of 471*) | |
Treatment effects | 282 (59.9) | |
Test results | 80 (17.0) | |
Clinical characteristics | 57 (12.1) | |
Diagnosis | 30 (6.4) | |
Pathogenesis, incidence, etiology | 13 (2.8) | |
Differential diagnosis | 9 (1.9) | |
Epidemiology | 0 (0.0) | |