Bulletin of the World Health Organization

Long-term trends in fetal mortality: implications for developing countries

Robert Woods

Volume 86, Number 6, June 2008, 460-466

Table 3. Associations between mortality rates

Association	α	β	r	R²%	n
Fig. 2 IMR/SBR	-3.2315	2.8385	0.8253	68.12	187
Fig. 3 e(0)/SBR	77.1610	-0.6850	-0.8180	66.09	187
Fig. 4 MMR/SBR	-7.8799	2.1842	0.7161	51.28	172
Fig. 5 MMR/attendants^a	127.4733	-1.2429	-0.7791	60.70	172
Fig. 6 SBR/attendants	45.0857	-0.3464	-0.6670	44.49	187

e(0), life expectancy at birth in years; IMR, infant mortality rate; MMR, maternal mortality rate per 10 000 live births; SBR, stillbirth rate.^a A better fit (R² = 66.06%) is given by the exponential relationship: y = 549.6446 * 10^–0.0223x which is illustrated in Fig. 5.