Quote:
Originally Posted by A&A 
"Circumcision rates vary significantly by the level of education obtained by a respondent's mother. The critical break occurred between respondents whose mothers did and did not earn a high school diploma. While 62% of respondents whose mothers did not finish high school were circumcised, the rate for all other respondents varied form 84% to 87%. These differences remained significant when other factors were controlled. Net of such factors, the odds of being circumcised for respondents whose mothers earned at least a high school diploma was about 2.5 times (95% CI, 1.9-3.8) that of those whose mothers were less educated. This discrepancy appeared to be narrowing in more recent cohorts. Among the youngest group of respondents, only those whose mothers had finished college displayed a significantly higher circumcision rate than those whose mothers had not earned a high school diploma." http://www.cirp.org/library/general/laumann/
And as this same link points out, race/ethnicity affects rates of circ, too.
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I don't think that has much to do with who is circ'ing in modern times.
If you look at who participated in that study, you'll see how it has little to do with the education levels of people who are currently deciding whether or not to circ.
Quote:
| Participants. - A national probability sample of 1410 American men aged 18 to 59 years at the time of the survey. In addition, an oversample of black and Hispanic minority groups is included in comparative analyses. |
Especially when you consider that this study is over 10 years old.
I would venture to speculate that a large part of the correlation between education level of the mothers and circ rate had more to do with simple timing. As the circ rate rose in the 60s so did the percentage of people pursuing high school diplomas. At the time when circ was less prevalent, high school diplomas were considered higher eductation not a basic minimum level of education.