Table 5 Median sample size per arm split by condition, study type and intervention type
N | Target sample size | |||
|---|---|---|---|---|
Median (IQR) | Minimum | Maximum | ||
Condition category | ||||
Cancer | 72 | 30 (25, 46) | 6 | 1598 |
Circulatory system | 72 | 30 (20, 43) | 4 | 200 |
Digestive system | 21 | 25 (16, 30) | 10 | 192 |
Ear, nose and throat | 6 | 41 (19, 55) | 15 | 71 |
Eye diseases | 9 | 33 (20, 45) | 10 | 50 |
Genetic diseases | 3 | 25 (20, 29) | 15 | 32 |
Haematological disorders | 5 | 25 (20, 28) | 20 | 65 |
Infections and infestations | 24 | 50 (35, 88) | 10 | 350 |
Injury, occupational diseases, poisoning | 24 | 25 (15, 33) | 10 | 51 |
Mental and behavioural disorders | 187 | 30 (22, 40) | 5 | 602 |
Musculoskeletal diseases | 55 | 26 (24, 40) | 10 | 232 |
Neonatal diseases | 4 | 57 (35, 87) | 20 | 125 |
Nervous system diseases | 46 | 25 (16, 39) | 5 | 383 |
Nutritional, metabolic, endocrine | 55 | 30 (20, 49) | 10 | 650 |
Oral health | 15 | 36 (20, 65) | 10 | 400 |
Pregnancy and childbirth | 27 | 45 (30, 70) | 5 | 175 |
Respiratory | 37 | 30 (25, 40) | 15 | 100 |
Signs and symptoms | 15 | 30 (20, 42) | 5 | 84 |
Skin and connective tissue diseases | 9 | 35 (25, 40) | 10 | 60 |
Surgery | 15 | 35 (25, 43) | 15 | 58 |
Urological and genital diseases | 28 | 25 (18, 52) | 6 | 400 |
Unknown | 32 | 46 (30, 76) | 12 | 350 |
Study type | ||||
Diagnostic | 8 | 63 (41, 79) | 6 | 125 |
Prevention | 63 | 40 (29, 70) | 10 | 650 |
Quality of life | 67 | 30 (21, 50) | 8 | 350 |
Screening | 12 | 60 (40, 245) | 20 | 1598 |
Treatment | 568 | 30 (20, 42) | 4 | 602 |
Othera | 43 | 40 (25, 56) | 6 | 140 |
Intervention type | ||||
Behavioural | 231 | 30 (20, 46) | 6 | 650 |
Biological/vaccine | 4 | 17 (14, 27) | 10 | 50 |
Device | 43 | 25 (17, 37) | 5 | 200 |
Drug | 50 | 30 (20, 57) | 12 | 265 |
Mixed | 24 | 29 (20, 60) | 10 | 100 |
Procedure/surgery | 64 | 25 (20, 37) | 4 | 232 |
Supplement | 18 | 25 (20, 32) | 15 | 100 |
Othera | 325 | 30 (24, 50) | 5 | 1598 |
Unknown | 2 | 23 (19, 26) | 15 | 30 |