It always seems to me that the death rate was much, much higher in urban environments. I suppose that was due to unclean water and infectious diseases in an overcrowded environment. In rural areas, even without much access to medical care, the children seem to have fared better. Here are some families in my tree all from rural areas in the northern United States:
#1. 7 children born 1831-1845, 1 died age 8.
#2. 6 children born 1861-1881, 1 died age 6.
#3. 5 children 1838-1849, no deaths
#4. 10 children born 1838-1854, no deaths
#5. 14 children born 1857-1885, 2 deaths in childhood
#6. 6 children born 1874-1886, 1 died age 6 mos.
#7. 9 children born 1845-1860, no deaths
#8. 7 children born 1876-1892, 1 death in infancy
6/64 children died before adulthood = 9%.