BMJ 2012; 345 doi: https://doi.org/10.1136/bmj.e7223 (Published 31 October 2012) Cite this as: BMJ 2012;345:e7223

Does the intake of dairy products affect blood pressure? In a meta-analysis of nine cohort studies that followed up a total of 57 000 subjects for between two and 15 years, there were over 15 000 cases of incident hypertension. Total consumption of dairy products and consumption of low fat dairy products and milk were inversely associated with blood pressure. But there was no relationship between blood pressure and the consumption of high fat dairy products, fermented dairy products, yoghurt, and cheese (Hypertension 2012;60:1131-7, doi:10.1161/hypertensionaha.112.195206).

Uncircumcised boys have more urinary tract infections (UTIs) than those who are circumcised, and researchers wondered whether a visible urethral meatus might be the critical factor. So 393 circumcised and uncircumcised boys, not yet potty trained, and from whom doctors had requested a catheter urine culture, were assessed. At insertion of the catheter, a nurse characterised the meatus as completely visible, partially visible, or non-visible. Of the circumcised boys, 4.8% had confirmed UTIs, significantly lower than the rate among uncircumcised boys with a fully visible meatus. Urethral visibility was therefore considered immaterial (CMAJ 2012;184:E796-803, doi:10.1503/cmaj.111372).

Age alone is no longer an absolute contradiction …

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