TABLE 3.

Correlation Coefficients Between Open Interval and the General Fertility Rate and the Total Fertility Rate: 74 Countries, Latest Demographic and Health Surveys, Various Datesa,b

Length of Open Intervals (months)General Fertility RateTotal Fertility Rate
<120.960.97
<240.960.97
<360.960.97
<480.950.96
<600.930.94
60+(0.93)(0.94)
  • a r values, when squared give R2 values.

  • b Interval data are from the latest surveys in the 74 countries; fertility data are as issued by the United Nations as of approximately 2017.