Characteristic | n | % |
---|---|---|
NIHR journal the cRCT was reported in (N = 79+) | ||
 HTA | 38 | 48 |
 PHR | 14 | 18 |
 HSDR | 5 | 6 |
 PGAR | 22 | 28 |
 EME | 0 | 0 |
Trial design (N = 86) | ||
 Parallel | 73 | 85 |
 Factorial | 7 | 8 |
 Cross-over | 2 | 2 |
 Others* | 4 | 5 |
Number of trial arms (N = 86) | ||
 2 | 69 | 80 |
 3 | 10 | 12 |
 2 × 2 | 4 | 5 |
 2 × 2 × 2 | 2 | 2 |
 2 × 6 | 1 | 1 |
Clinical area (N = 86) | ||
 Cancer/oncology | 8 | 9 |
 Mental health (including neurosciences/psychiatry/psychology/dementia) | 21 | 25 |
 Orthopaedics/rheumatology/musculoskeletal (including back pain) | 2 | 2 |
 Obstetrics and gynaecology | 2 | 2 |
 Primary care | 6 | 7 |
 Cardiovascular | 1 | 1 |
 Gastrointestinal | 2 | 2 |
 Respiratory | 1 | 1 |
 Stroke | 4 | 5 |
 Diabetes | 6 | 7 |
 Dermatology (including ulcers) | 1 | 1 |
 Others†| 32 | 37 |
Setting (N = 86) | ||
 Hospital | 4 | 5 |
 General practice | 25 | 29 |
 Mixed | 3 | 3 |
 Community | 3 | 3 |
 Others‡ | 51 | 59 |
Level of clustering (N = 86) | ||
 2 | 85 | 99 |
 3 | 1 | 1 |
Trial registration (N = 86) | ||
 ISRCTN | 78 | 91 |
 NTC | 2 | 2 |
 Not reported | 6 | 7 |
Type of intervention (N = 86) | ||
 Therapy | 8 | 9 |
 Behaviour change technique | 4 | 5 |
 Complex intervention | 17 | 20 |
 Education | 12 | 14 |
 Exercise | 3 | 3 |
 Information and communication technology | 3 | 3 |
 Medical device | 2 | 2 |
 Screening | 2 | 2 |
 Training | 17 | 20 |
 Others§ | 18 | 21 |
Type of control (N = 86) | ||
 Active | 86 | 100 |
Are patient blinded (N = 86) | ||
 Yes | 8 | 9 |
 No | 78 | 91 |
Any form of a pilot studya (N = 86) | ||
 Yes | 72 | 84 |
 No | 14 | 16 |
Geographical region (N = 86) | ||
 Multiple regions | 54 | 63 |
 Regional | 32 | 37 |