Table 4. Absolute β convergence for infant mortality rate across countries, 1950–55, 2010–15.

Period	β coefficient	P value	CI [95%] (Lower-Upper limit)	Adjusted R2	Speed of convergence (% per annum)
1950–55 to 1980–85	0.0094	0.000	(0.0063–0.0124)	0.16	-0.8
1985–90 to 2010–15	0.0099	0.000	(0.0049–0.0149)	0.07	-0.9
1950–55 to 2010–15	0.0063	0.000	(0.0037–0.0089)	0.10	-0.5