geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

A class of linear spectral models and analyses for the study of longitudinal data


, : A class of linear spectral models and analyses for the study of longitudinal data. Biometrics 45(3): 831-850

Longitudinal data can always be represented by a time series with a deterministic trend and randomly correlated residuals, the latter of which do not usually form a stationary process. The class of linear spectral models is a basis for the exploratory analysis of these data. The theory and techniques of factor analysis provide a means by which one component of the residual series can be separated from an error series, and then partitioned into a sum of randomly scaled metameters that characterize the sample paths of the residuals. These metameters, together with linear modelling techniques, are then used to partition the nonrandom trend into a determined component, which is associated with the sample paths of the residuals, and an independent inherent component. Linear spectral models are assumption-free and represent both random and nonrandom trends with fewer terms than any other mixed-effects linear model. Data on body-weight growth of juvenile mice are used in this paper to illustrate the application of linear spectral models through a relatively sophisticated exploratory analysis.

US$19.90

PMID: 2790124

DOI: 10.2307/2531686


Other references

Lattin, Jd, 2005: Physopleurella floridana Blatchley, 1925, a synonym of Physopleurella mundula (White, 1877) (Hemiptera: Heteroptera: Cimicoidea: Anthocoridae). Proceedings of the Entomological Society of Washington 107(2): 460-462

Anonymous, 1966: "Rules governing complete dental hospital staff membership and privileges updated in Albuquerque hospitals". New Mexico Dental Journal 17(1): 17-17

Simon-Sylvestre, G.; Trocme, S., 1969: Remarks on sulphur fertilizing. In a long-term experiment (1957-66) annual dressings of 0, 75 or 225 kg/ha S were applied over 10 yr to 4 crops of wheat, 2 crops of barley, 3 crops of potatoes and 1 crop of sugar beet. No increase in yields or in sugar content (for sugar beet) w...

Shimatsu, Y.; Uchida, M.; Niki, R.; Imai, H., 2004: Effects of a synthetic progestogen, altrenogest, on oestrus synchronisation and fertility in miniature pigs. Groups of six, six and eight miniature gilts, respectively, received 5, 10 or 15 mg/day of altrenogest for 18 days, and the numbers of corpora lutea and residual follicles were counted approximately 14 days after the treatment by an exploratory la...

Sorensen P.S.; Boysen G.; Jensen G.; Schnohr P., 1982: Prevalence of stroke in a district of copenhagen denmark the copenhagen city heart study. From the city center of Copenhagen, almost 20,000 people, 20 yr of age and older, were randomly selected for examination after age and sex stratification. The participation rate was 72%. Persons (231) responded affirmatively to a questionnaire con...

Michael, J.P.; de Koning, C.B.; van der Westhuyzen, C.W., 2005: Studies towards the enantioselective synthesis of 5,6,8-trisubstituted amphibian indolizidine alkaloids via enaminone intermediates. Investigations aimed at the enantioselective total synthesis of indolizidine 223A, a recently described 5,6,8-trisubstituted indolizidine alkaloid from a dendrobatid frog, are described. tert-Butyl (2R,3R)-3-amino-2-ethylhexanoate and its (2S,3R)-...

Estroff D.T.; Greenman J.A.; Heyward W.L.; Mcmahon B.J.; Hardison H.H.; Bender T.R., 1985: Increased prevalence of hepatitis b surface antigen in pregnant alaska usa eskimos. Fortuine, R (Ed ) Circumpolar Health 84; Sixth International Symposium, Anchorage, Alaska, Usa, May 13-18, 1984 Xxiv+484p University Of Washington Press: Seattle, Wash , Usa Illus 206-208

Bénard, A.; Morlière, C.; Verpillot, E.; Donon, L.; Salmi, L.R.; Joseph, P.A.; Vignes, J.R., 2014: A Cost-Utility Analysis of Sacral Anterior Root Stimulation (SARS) Compared to Medical Treatment in Complete Spinal Cord Injured Patients with a Neurological Bladder. Value in Health 17(7): A398-A398

Zhang, Q.; Ou, C.; Ye, S.; Song, X.; Luo, S., 2017: Construction of nanoscale liposomes loaded with melatonin via supercritical fluid technology. Melatonin-loaded liposomes (MLL) were successfully prepared using rapid expansion of supercritical solution technology. The effects of supercritical pressure on encapsulation efficiency (EE) and average particle size were then analysed. Meanwhile,...

Wang, Y.; Wang, H.; Ding, Y.; Li, Y.; Chen, S.; Zhang, L.; Wu, H.; Zhou, J.; Duan, K.; Wang, W.; Chen, C.; Yang, Q., 2017: N-peptide of vMIP-Ⅱ reverses paclitaxel-resistance by regulating miRNA-335 in breast cancer. Acquisition of resistance to paclitaxel is one of the most important problems in treatment of breast cancer patients, but the molecular mechanisms underlying sensitivity to paclitaxel remains elusive. Emerging evidence has demonstrated that microR...