Lopez-Escobar G, Fortney J A, Riano-Gamboa G, Daza L
Int J Gynaecol Obstet. 1978;17(1):40-6. doi: 10.1002/j.1879-3479.1979.tb00113.x.
The International Fertility Research Program, in cooperation with the Government of Colombia, drew a random sample of urban hospitals in which obstetric deliveries take place. Data were collected on a sample of the deliveries. Hospitals were divided into six types: university, university maternity, social security and three sizes of general hospitals. These groups of hospitals are compared with respect to the proportion of high-risk patients admitted, intervention rates and perinatal mortality rates.