1905 Journal of the American Medical Association (JAMA)  
has steadily declined during the last 20 years, while the rate calculated in the ordinary way shows a slight increase. For the birth rate, again, the total population is not regarded as the best basis of calculation, because it does not take into account age constitution of the female population, particularly of that portion at the child-bearing age. For example, the population of women aged from 15 to 45 years to the total population, which was 23.1 per cent in 1871 and in 1881, rose to 25 per
more » ... 881, rose to 25 per cent, in 1901. If, therefore, the average fecundity of the female population had remained constant, the births registered in 1903, which numbered 948,271, would have amounted to 1,250,000. Thus the better method of measuring the birth rate is to calculate the proportion of births per 1,000 women of the child-bearing ages. The result shows a decrease far greater than that indicated by rates based on the total population. The English birth rate calculated in the ordinary way appears to have decreased by 6.8 per cent, only in the last
doi:10.1001/jama.1905.02500410055017 fatcat:kwzwra7bdjeqjhmk4xti4ssxea