Table 1 Number of abstracts in each subcategory in a randomly selected corpus of 455 RCT abstracts.
Classes | Total | R1 | R2 | R3 | N1 | N2 | N3 |
|---|---|---|---|---|---|---|---|
| Â | Â | Single RCT | Complex RCT | RCT substudy | RCT protocol or announcement | Systematic review | Other study |
N (%) | 455 | 336 (73.8%) | 21 (4.6%) | 34 (7.5%) | 5 (1.1%) | 6 (1.3%) | 53 (11.6%) |