@article {7161, title = {Gait Speed Predicts Incident Disability: A Pooled Analysis.}, journal = {J Gerontol A Biol Sci Med Sci}, volume = {71}, year = {2016}, month = {2016 Jan}, pages = {63-71}, abstract = {

BACKGROUND: Functional independence with aging is an important goal for individuals and society. Simple prognostic indicators can inform health promotion and care planning, but evidence is limited by heterogeneity in measures of function.

METHODS: We performed a pooled analysis of data from seven studies of 27,220 community-dwelling older adults aged 65 or older with baseline gait speed, followed for disability and mortality. Outcomes were incident inability or dependence on another person in bathing or dressing; and difficulty walking {\textonequarter} - {\textonehalf} mile or climbing 10 steps within 3 years.

RESULTS: Participants with faster baseline gait had lower rates of incident disability. In subgroups (defined by 0.2 m/s-wide intervals from <0.4 to >= 1.4 m/s) with increasingly greater gait speed, 3-year rates of bathing or dressing dependence trended from 10\% to 1\% in men, and from 15\% to 1\% in women, while mobility difficulty trended from 47\% to 4\% in men and 40\% to 6\% in women. The age-adjusted relative risk ratio per 0.1 m/s greater speed for bathing or dressing dependence in men was 0.68 (0.57-0.81) and in women: 0.74 (0.66-0.82); for mobility difficulty, men: 0.75 (0.68-0.82), women: 0.73 (0.67-0.80). Results were similar for combined disability and mortality. Effects were largely consistent across subgroups based on age, gender, race, body mass index, prior hospitalization, and selected chronic conditions. In the presence of multiple other risk factors for disability, gait speed significantly increased the area under the receiver operator characteristic curve.

CONCLUSION: In older adults, gait speed predicts 3 year incidence of bathing or dressing dependence, mobility difficulty, and a composite outcome of disability and mortality.

}, keywords = {Activities of Daily Living, Aged, Aged, 80 and over, Aging, Cohort Studies, Disability Evaluation, Disabled Persons, Female, Gait, Geriatric Assessment, Humans, Independent Living, Male, Mobility Limitation, Predictive Value of Tests, Prognosis, Psychomotor Performance, Risk Assessment, Risk Factors, ROC Curve, Survival Analysis, United States}, issn = {1758-535X}, doi = {10.1093/gerona/glv126}, author = {Perera, Subashan and Patel, Kushang V and Rosano, Caterina and Rubin, Susan M and Satterfield, Suzanne and Harris, Tamara and Ensrud, Kristine and Orwoll, Eric and Lee, Christine G and Chandler, Julie M and Newman, Anne B and Cauley, Jane A and Guralnik, Jack M and Ferrucci, Luigi and Studenski, Stephanie A} } @article {7254, title = {Genetic Variants Associated with Circulating Parathyroid Hormone.}, journal = {J Am Soc Nephrol}, year = {2016}, month = {2016 Dec 07}, abstract = {

Parathyroid hormone (PTH) is a primary calcium regulatory hormone. Elevated serum PTH concentrations in primary and secondary hyperparathyroidism have been associated with bone disease, hypertension, and in some studies, cardiovascular mortality. Genetic causes of variation in circulating PTH concentrations are incompletely understood. We performed a genome-wide association study of serum PTH concentrations among 29,155 participants of European ancestry from 13 cohort studies (n=22,653 and n=6502 in discovery and replication analyses, respectively). We evaluated the association of single nucleotide polymorphisms (SNPs) with natural log-transformed PTH concentration adjusted for age, sex, season, study site, and principal components of ancestry. We discovered associations of SNPs from five independent regions with serum PTH concentration, including the strongest association with rs6127099 upstream of CYP24A1 (P=4.2 {\texttimes} 10(-53)), a gene that encodes the primary catabolic enzyme for 1,25-dihydroxyvitamin D and 25-dihydroxyvitamin D. Each additional copy of the minor allele at this SNP associated with 7\% higher serum PTH concentration. The other SNPs associated with serum PTH concentration included rs4074995 within RGS14 (P=6.6 {\texttimes} 10(-17)), rs219779 adjacent to CLDN14 (P=3.5 {\texttimes} 10(-16)), rs4443100 near RTDR1 (P=8.7 {\texttimes} 10(-9)), and rs73186030 near CASR (P=4.8 {\texttimes} 10(-8)). Of these five SNPs, rs6127099, rs4074995, and rs219779 replicated. Thus, common genetic variants located near genes involved in vitamin D metabolism and calcium and renal phosphate transport associated with differences in circulating PTH concentrations. Future studies could identify the causal variants at these loci, and the clinical and functional relevance of these variants should be pursued.

}, issn = {1533-3450}, doi = {10.1681/ASN.2016010069}, author = {Robinson-Cohen, Cassianne and Lutsey, Pamela L and Kleber, Marcus E and Nielson, Carrie M and Mitchell, Braxton D and Bis, Joshua C and Eny, Karen M and Portas, Laura and Eriksson, Joel and Lorentzon, Mattias and Koller, Daniel L and Milaneschi, Yuri and Teumer, Alexander and Pilz, Stefan and Nethander, Maria and Selvin, Elizabeth and Tang, Weihong and Weng, Lu-Chen and Wong, Hoi Suen and Lai, Dongbing and Peacock, Munro and Hannemann, Anke and V{\"o}lker, Uwe and Homuth, Georg and Nauk, Matthias and Murgia, Federico and Pattee, Jack W and Orwoll, Eric and Zmuda, Joseph M and Riancho, Jose Antonio and Wolf, Myles and Williams, Frances and Penninx, Brenda and Econs, Michael J and Ryan, Kathleen A and Ohlsson, Claes and Paterson, Andrew D and Psaty, Bruce M and Siscovick, David S and Rotter, Jerome I and Pirastu, Mario and Streeten, Elizabeth and M{\"a}rz, Winfried and Fox, Caroline and Coresh, Josef and Wallaschofski, Henri and Pankow, James S and de Boer, Ian H and Kestenbaum, Bryan} } @article {7848, title = {Genome-wide meta-analysis of 158,000 individuals of European ancestry identifies three loci associated with chronic back pain.}, journal = {PLoS Genet}, volume = {14}, year = {2018}, month = {2018 Sep}, pages = {e1007601}, abstract = {

Back pain is the $\#$1 cause of years lived with disability worldwide, yet surprisingly little is known regarding the biology underlying this symptom. We conducted a genome-wide association study (GWAS) meta-analysis of chronic back pain (CBP). Adults of European ancestry were included from 15 cohorts in the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium, and from the UK Biobank interim data release. CBP cases were defined as those reporting back pain present for >=3-6 months; non-cases were included as comparisons ("controls"). Each cohort conducted genotyping using commercially available arrays followed by imputation. GWAS used logistic regression models with additive genetic effects, adjusting for age, sex, study-specific covariates, and population substructure. The threshold for genome-wide significance in the fixed-effect inverse-variance weighted meta-analysis was p<5{\texttimes}10-8. Suggestive (p<5{\texttimes}10-7) and genome-wide significant (p<5{\texttimes}10-8) variants were carried forward for replication or further investigation in the remaining UK Biobank participants not included in the discovery sample. The discovery sample comprised 158,025 individuals, including 29,531 CBP cases. A genome-wide significant association was found for the intronic variant rs12310519 in SOX5 (OR 1.08, p = 7.2{\texttimes}10-10). This was subsequently replicated in 283,752 UK Biobank participants not included in the discovery sample, including 50,915 cases (OR 1.06, p = 5.3{\texttimes}10-11), and exceeded genome-wide significance in joint meta-analysis (OR 1.07, p = 4.5{\texttimes}10-19). We found suggestive associations at three other loci in the discovery sample, two of which exceeded genome-wide significance in joint meta-analysis: an intergenic variant, rs7833174, located between CCDC26 and GSDMC (OR 1.05, p = 4.4{\texttimes}10-13), and an intronic variant, rs4384683, in DCC (OR 0.97, p = 2.4{\texttimes}10-10). In this first reported meta-analysis of GWAS for CBP, we identified and replicated a genetic locus associated with CBP (SOX5). We also identified 2 other loci that reached genome-wide significance in a 2-stage joint meta-analysis (CCDC26/GSDMC and DCC).

}, issn = {1553-7404}, doi = {10.1371/journal.pgen.1007601}, author = {Suri, Pradeep and Palmer, Melody R and Tsepilov, Yakov A and Freidin, Maxim B and Boer, Cindy G and Yau, Michelle S and Evans, Daniel S and Gelemanovic, Andrea and Bartz, Traci M and Nethander, Maria and Arbeeva, Liubov and Karssen, Lennart and Neogi, Tuhina and Campbell, Archie and Mellstr{\"o}m, Dan and Ohlsson, Claes and Marshall, Lynn M and Orwoll, Eric and Uitterlinden, Andre and Rotter, Jerome I and Lauc, Gordan and Psaty, Bruce M and Karlsson, Magnus K and Lane, Nancy E and Jarvik, Gail P and Polasek, Ozren and Hochberg, Marc and Jordan, Joanne M and van Meurs, Joyce B J and Jackson, Rebecca and Nielson, Carrie M and Mitchell, Braxton D and Smith, Blair H and Hayward, Caroline and Smith, Nicholas L and Aulchenko, Yurii S and Williams, Frances M K} }