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Table 1 Descriptive statistics for studies and participant groups by field

From: Selection bias on intellectual ability in autism research: a cross-sectional review and meta-analysis

Field Studies, N (%) Total number of participants Number with ASD Characteristics of ASD population
  Median IQR Median IQR Mean % male Mean age (years)
Interventions 35 (11) 33 70 30 48 82 11
Biology—neuroimaging, neuropathology, genetics and omics 38 (13) 51 69 26 41 83 17
Epidemiology 22 (7) 10,197 54,362 457 1623 72 8
Psychology and cognitive neuroscience 126 (42) 54 49 24 25 82 17
Social, school, education and family circumstances 45 (15) 97 198 74 123 78 14
Diagnostics, diagnostic scales, identification, screening and scale development 35 (12) 162 298 103 197 79 15
All 301 (100) 62 116 32 67 80 15