“…Children suffering from an SID would normally require hospital treatment, whereas the likelihood of LSID hospitalization could be influenced by other factors such as the health and socioeconomic position of the parents but also by the admitting physician's judgement of parent's capability to take care of a sick child and how worried and frightened the parents are by the sickness of the child [46]. Information on SID (sepsis, meningitis, pyelonephritis, osteomyelitis, ethmoiditis) [6,33,47] and LSID (pneumonia, upper respiratory infections, gastroenteritis, cystitis, bronchitis, conjunctivitis, influenza) [39] (diseases and diagnostic codes are listed in the "Appendix") was obtained from the Danish Hospital Discharge Register which contains information on all hospitalizations (excluding psychiatric hospitalizations) in Denmark since January 1977, including outpatient treatments since 1995.…”