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H1N1 more severe among blacks and Hispanics than whites in Boston

From BPHCFrom BPHC

The Boston Public Health Commission has posted findings from a study of swine-flu cases in Boston over the past year. One key finding: Hispanics required hospitalization for H1N1 more than four times as often as whites; black three times as often. Almost half the blacks requiring a hospital stay had asthma, which the commission says underscores the need for particularly active vaccination programs for people with certain other existing health issues (UPDATE: Sharp-eyed, statistics-minded SwirlyGrrl notes in the comments the problem seems to be among minority children, not adults).

Also, North Dorchester was the only area to get hit hard during spring and autumn waves of the infection - other neighborhoods tends to be hard hit during one or the other season. To date, 7 Bostonians have died from H1N1

City statistics show dramatically higher emergency-room visits than in past years, peaking around early June and early November, but the commission says H1N1 is still around and people should still get vaccinated - especially if they're in a high-risk group.

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Comments

The minority populations in Boston tend to be younger (on average) than the white population. This virus attacks all age groups, but disproportionately skews to younger people. Ergo, higher attack rate is guarenteed in minority populations because those populations are younger. Comparisons of rates of infection and rates of hospitalization won't be valid unless the disperate age distributions of the populations are appropriately accounted for.

One of their slides presents an age-stratified analysis - and that stratified analysis says that the hospitalization rates amongst black and hispanic children are much higher than they are for white kids. All other age groups are the same (statistically equivalent) across ethnicity. This should be the headline!

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Agreed; and children are more likely to suffer severe symptoms than non-senior adults. Likewise, minority populations skew poorer and are far more likely to seek medical treatment at a hospital rather than a family doctor. Hence, "hospitalization" may not equate with severity. BPHC has a clear trend of emphasizing "racial disparities" in all it does, an apparent political agenda not always supported by its stats, or not in the ways it presents. Also, it appears that BPHC is, as usual, using incorrect maps of Boston neighborhoods.

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does the shift from being predominantly 5-17 year olds to being predominantly 18-44 matter? I guess I need to find myself a good source for population data.

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It probably means that, like nearly all community flu epidemics, it ripped through the schools and summer camps during the early phases and most youngsters are now immune. This is one big reason why there is now a push to vaccinate all kids for seasonal flu - epidemics get a foothold in communities by brewing up in the schools!

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i'd be interested to see a population density map showing the same area...

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The thematic map has "cases per 100,000 population".

Not a direct depiction, sure, but at least it is an adjustment for density.

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