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The tenth data release of the Sloan digital sky survey: First spectroscopic data from the SDSS-iii apache point observatory galactic evolution experiment
The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the tenth public data release (DR10) from its current incarnation, SDSS-III. This data release includes the first spectroscopic data from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS) taken through 2012 July. The APOGEE instrument is a near-infrared R ~ 22,500 300-fiber spectrograph covering 1:514-1:696 ÎĽm. The APOGEE survey is studying the chemical abundances and radial velocities of roughly 100,000 red giant star candidates in the bulge, bar, disk, and halo of the Milky Way. DR10 includes 178,397 spectra of 57,454 stars, each typically observed three or more times, from APOGEE. Derived quantities from these spectra (radial velocities, effective temperatures, surface gravities, and metallicities) are also included.
DR10 also roughly doubles the number of BOSS spectra over those included in the ninth data release. DR10 includes a total of 1,507,954 BOSS spectra, comprising 927,844 galaxy spectra; 182,009 quasar spectra; and 159,327 stellar spectra, selected over 6373.2 deg2.This is an author-created, un-copyedited version of an article accepted for publication in The Astrophysical Journal Supplement Series. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0067-0049/211/2/17. The accepted version will be under embargo until the 18th March 2015
Application and interpretation of multiple statistical tests to evaluate validity of dietary intake assessment methods
Assessing the validity of a self-administered food-frequency questionnaire (FFQ) in the adult population of Newfoundland and Labrador, Canada
Background: The Food- Frequency Questionnaire (FFQ) is a dietary assessment tool frequently used in large-scale
nutritional epidemiology studies. The goal of the present study is to validate a self-administered version of the
Hawaii FFQ modified for use in the general adult population of Newfoundland and Labrador (NL).
Methods: Over a one year period, 195 randomly selected adults completed four 24-hour dietary recalls (24-HDRs)
by telephone and one subsequent self-administered FFQ. Estimates of energy and nutrients derived from the
24-HDRs and FFQs were compared (protein, carbohydrate, fibre, fat, vitamin A, carotene, vitamin D, and calcium).
Data were analyzed using the Pearson’s correlation coefficients, cross-classification method, and Bland–Altman plots.
Results: The mean nutrient intake values of the 24-HDRs were lower than those of the FFQs, except for protein in
men. Sex and energy-adjusted de-attenuated Pearson correlation coefficients for each nutrient varied from 0.13 to
0.61. Except for protein in men, all correlations were statistically significant with p < 0.05. Cross-classification analysis
revealed that on average, 74% women and 78% men were classified in the same or adjacent quartile of nutrient
intake when comparing data from the FFQ and 24-HDRs. Bland–Altman plots showed no serious systematic bias
between the administration of the two instruments over the range of mean intakes.
Conclusion: This 169-item FFQ developed specifically for the adult NL population had moderate relative validity
and therefore can be used in studies to assess food consumption in the general adult population of NL. This tool
can be used to classify individual energy and nutrient intakes into quartiles, which is useful in examining
relationships between diet and chronic disease