Table 2.

Summary findings of studies included in the systematic review

Reference/year of publication	Data location	Data source	Prevalence per 1000/years covered	Denominator
McGuire et al 31 2019	USA	National Health Interview Survey	3.20 2009–2016	3–17 years children
Pulgar et al 32 2019	USA	Medicaid data base	1.78 2013–2015	2–20 years children
Li et al 33 2019	USA	Medicaid data base	2.8 1996–2009	Live births
Khandaker et al 34 2019	Bangladesh	Clinical database	3.4 2015–2016	Live births
Hoei-Hansen et al 35 2019	Denmark	Clinical database	1.99 1999–2007	Live births
Gincota Bufteac et al 36 2018	Moldova	Clinical database (single hospital that covers 75% of population)	3.4 2009–2010	Live births
Hollung et al 37 2018	Norway	Medical Birth Registry of Norway	2.35 1999–2010	Live births
Himmelmann and Uvebrant38 2017	Sweden	Clinical database	1.96 2007–2010	Live births
Kakooza-Mwesige et al 39 2017	Uganda	Population screening	2.7 2015	2–17 years children
Robertson et al 40 2017	Canada	Clinical database	2.22 2008–2010	5-year-old children
Touyama et al 41 2016	Japan	Clinical database	1.88 1988–2007	Live births
Maenner et al 42 2016	USA	Clinical database	2.6 2011–2013	2–17 years
Smithers-Sheedy et al 43 2016	Australia	Clinical database	2 1993–2006	Live births
Frøslev-Friis et al 44 2015	Denmark	Clinical database	2.4 2003–2008	Live births
Himmelmann and Uvebrant45 2014	Sweden	Clinical database	2.18 2003–2006	Live births
Raina et al 46 2010	India	Population survey	2.77 1999–2009	Children under the age of 10
Chollat et al 47 2021	France	Clinical database	33.93 2007–2015	Preterm infrants born <33 weeks to survivors at 2 years
Jensen et al 48 2022	Denmark	Danish Cerebral Palsy Register	1.95 1997–2013	Babies born >21 weeks to term and alive after their first birthday
Prasad and Corbett49 2019	Canada	Clinical database	2.81 1994–1999	Children aged 0–15 years
Sellier et al 50 2021	Australia and Europe	Administrative database and other sources	6.87 1992–2009	Infants born from multiple births surviving by 4 years
Perra et al 51 2021	Europe	Population-based registers	Singletons: 1.64. Multiple birth: 7.02 among multiples 1990–2008	Singleton and multiple births surviving by age of 4 years