"Figure 5: Unexplained infant deaths, by NS-SEC of parents, 2013[1,2,3,4]","" "England and Wales","" "","" "Notes","1. Data for 2013 are provisional 2. Based on deaths occurring in each calendar year 3. Based on the dominant NS-SEC of the mother or father at death registration. Information on NS-SEC of the father outside marriage is not collected if the father does not attend the registration of the baby's birth. “All” will include cases where the father's NS-SEC is not stated 4. ""Marriage"" includes civil partnerships" "Unit","Rates per 1,000 live births" "","" "","Inside Marriage","All joint registration","Outside Marriage" "Managerial","0.1","0.15","0.26" "Intermediate","0.13","0.29","0.45" "Routine","0.25","0.45","0.58"