Limitations
Our results are based on a small clinical population from one Swedish
county. Nevertheless, the prevalence of CP was similar to figures
reported elsewhere, indicating that it is a representative sample. The
youngest children were only 2 years of age when we conducted the initial
search, which entails the risk that not all children with CP were
identified. However, no child was identified after two years, and only
two children meeting the inclusion criteria were identified in the
complementary search. The retrospective design limited our access to the
entries made at the children’s hospital, possibly resulting in missed
information from other sources, such as the CHS. The review was mainly
performed by the first author, and to reduce the risk of bias, a
template was used when collecting the data.