This work has become a touchstone for high-altitude respiratory physiology, celebrated as the first detailed and systematic laboratory-based study of increased and diminished air pressure.
In addition, some population- or hospital- based studies of respiratory tract infection also revealed the increased risk of nosocomial and community-acquired pneumonia in patients with PPI use, while the role of histamine 2 receptor antagonist (H2RA) was controversial [ 7- 9].
6 One population based study reported an increased prevalence of heart defects after use of citalopram in the first trimester.
13 However, another register based study reported an increased risk of serious infections associated with infliximab use in people with inflammatory bowel disease, 14 as did a study based on data from the Food and Drug Administration Adverse Event Reporting System.
20 21 In contrast, large register based studies from Sweden found increased risks of attention-deficit/hyperactivity disorder 7 and behavioural problems, 22 although significance was lost after adjustment for length of involuntary childlessness and restriction to term infants, respectively.
A larger population based study has shown a slightly increased level of risk (RR 1.4) for term newborns born to women who live in communities served by a small hospital (< 100 per year) compared to those in communities served by a large hospital (> 2000 births) [ 12].
Conclusions In this prospective population based study, new use of benzodiazepines was associated with increased risk of dementia.
Reports of urban based studies suggest an increase in the prevalence of MS worldwide along with diabetes, hypertension and atherogenic dyslipidemia.
Though not easily comparable due to differences in methodology to reach diagnosis (i.e. psychiatric interviews and scales), population based studies generally indicate an increased risk of affective and anxiety disorders in patients with migraine, compared to non-migrainous subjects.
The International Agency for Research on Cancer classified TCDD as a known human carcinogen, primarily based on occupational studies of increased mortality from all cancers combined.
1 In the United States, gestational diabetes affects 1.1-25.51.1-25.5%nancies depending on the criteria used. 2 It represents a growing health concern; multiple population based studies have shown increases in the occurrence of gestational diabetes in the past decade.
