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Table 3 General characteristics of the included randomized controlled trial reports

From: Avoidable waste related to inadequate methods and incomplete reporting of interventions: a systematic review of randomized trials performed in Sub-Saharan Africa

Characteristics N = 121
Trial location
 Sub-Saharan countries only 104 (85.9)
  • South Africa 20 (19.2)
  • Nigeria 12 (11.5)
  • Tanzania 10 (9.6)
  • Kenya 8 (7.6)
  • Uganda 8 (7.6)
  • Malawi 6 (5.7)
  • Rwanda 4 (3.8)
  • Ethiopia 3 (2.8)
 Several Sub-Saharan countries 5 (4.1)
 Sub-Saharan African countries and high-income countries (HICs) or other countries (not HICs) 12 (8.9)
Medical area
 Malaria 25 (20.6)
 HIV/AIDS 24 (19.9)
 Tuberculosis 4 (3.3)
 Diarrheal diseases 3 (2.4)
 Preterm birth complications 2 (1.6)
 Other diseases 63 (52.2)
Study design
 Parallel groups 97 (80.1)
 Clusters 19 (15.8)
 Factorial design 3 (2.4)
 Cross-over 2 (1.7)
Experimental intervention
 Pharmacological (drugs and nutritional supplements) 74 (61.1)
 Nonpharmacological 47 (38.9)
  • Participative interventions 40 (85.1)
  • Devices 3 (6.3)
  • Surgical procedures 1 (2.3)
  • Therapeutic strategies 3 (6.3)
Comparator
 Active treatment 43 (35.5)
 Usual care 32 (26.4)
 Placebo 24 (19.9)
 Other 22 (18.2)
Sample size (median [IQR]) 346 [160–932]
  1. Data are number. (%) unless indicated. IQR interquartile range