OBJECTIVE The aim of the study was to validate self-reported colorectal cancer (CRC) screening using the National Cancer Institute Colorectal Cancer Screening questionnaire. MATERIALS AND METHODS 890 patients, ages 50 to 75 years, from the Minneapolis Veterans Affairs (VA) Medical Center were surveyed by mail. Phone administration was attempted with mail nonresponders. VA and non-VA records w...

Identity is recognized as an important aspect of psychosocial well-being. This study examined the self-concept and cultural identity of 550 youth in a community based sample of high school students in Canada. A revised version of Kuhn and McPartland’s (1954) Twenty Statement Test and Oetting and Beauvais’ (1991) orthogonal cultural identification item were used to gather data. The relationship ...

BACKGROUND With the growing scientific appeal of e-epidemiology, concerns arise regarding validity and reliability of Web-based self-reported data. OBJECTIVE The objectives of the present study were to assess the validity of Web-based self-reported weight, height, and resulting body mass index (BMI) compared with standardized clinical measurements and to evaluate the concordance between Web-b...

A cobordism between links in thickened surfaces consists of a surface $ S and $3$-manifold $M $, with properly embedded M \times I $. We show that there exist such if $(S,M) is them which simple, then must be complex. That is, are cases low complexity the does not imply $3$-manifold. Specifically, we concordant concordance can only realised by passing through thickenings higher genus surfaces. ...

As a corollary of work of Ozsváth and Szabó, it is shown that the classical concordance group of algebraically slice knots has an infinite cyclic summand and in particular is not a divisible group. Let A denote the concordance group of algebraically slice knots, the kernel of Levine’s homomorphism φ : C → G, where C is the classical knot concordance group and G is Levine’s algebraic concordance...

Let K ⊂ R be a regular convex cone, let e1, . . . , en ∈ ∂K be linearly independent points on the boundary of a compact affine section of the cone, and let x∗ ∈ K be a point in the relative interior of this section. For k = 1, . . . , n, let lk be the line through the points ek and x ∗, let yk be the intersection point of lk with ∂K opposite to ek, and let zk be the intersection point of lk wit...