Ziggurat
Penultimate Amazing
- Joined
- Jun 19, 2003
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- 64,235
How about this study, comparing foetal and infant mortality between the US and Canada?
It's interesting, and suggests that at least relative to Canada there is indeed a difference in rates. However, their conclusions about causes are not actually supported.
For example, they say, "In general, differences in gestational age distributions reflect aspects of maternal health, whereas differences in gestational age-specific mortality reflect differences in healthcare, both obstetric and neonatal." But they give no evidence for this latter conclusion. One would indeed expect that differences in healthcare could produce differences in gestational age-specific mortality, but they give no reason to think this is the only, or even primary, causative factor, and that issues like lifestyle and demographics would be irrelevant or unimportant.
They go on to say, "Thus, higher stillbirth rates at term can reflect lesser access to, or use or quality of, foetal monitoring and obstetric interventions, while higher post-neonatal mortality rates can be a consequence of adverse health behaviours (prone sleep position, unintentional injury.)"
Yes, those effects can reflect those causes. But they could also reflect other causes. For example, smoking (an adverse health behavior if there ever was one) might contribute to higher stillbirth rates, but is not an issue of foetal monitoring or obstetric intervention.
And note too that even the demographics of the mothers was markedly different. As I already mentioned, teenage pregnancies have higher infant mortality rates even within the same health care system. Mothers under 20 made up almost twice as large a fraction of the sample for the US compared to Canada (12.8% vs. 6.6%). But such differences were not controlled for, and so one cannot conclude from this paper how much such differences in demographics might have contributed to the differences in mortality rates.