Year
1950
1960
1970
1980
1990
2000
2009
Perinatal mortality rate (y)
46.6
41.4
21.7
11.7
5.7
3.8
2.9
% Hospital births (
x
)
4.6
50.1
96.1
99.5
99.9
99.8
99.8
Regression analysis of the data yields the equation y =–0.45x+54.09 (R
^{2}
=0.83, two-tailed P=0.004), where x is % hospital births and y is perinatal mortality rate
Table 3:
Correlation between perinatal mortality and the rate of hospital births.