What's the difference between prevalence and ratio?

Prevalence


Definition:

  • (n.) The quality or condition of being prevalent; superior strength, force, or influence; general existence, reception, or practice; wide extension; as, the prevalence of virtue, of a fashion, or of a disease; the prevalence of a rumor.

Example Sentences:

  • (1) PMS is more prevalent among women working outside the home, alcoholics, women of high parity, and women with toxemic tendency; it probably runs in families.
  • (2) The prevalence of 24.4% among Mexican American men was similar to that among men from other ethnic backgrounds.
  • (3) A survey carried out two and three years after the launch of the official campaign also showed a reduction in the prevalence of rickets in children taking low dose supplements equivalent to about 2.5 micrograms (100 IU) vitamin D daily.
  • (4) Prevalence data has been gathered from several autopsy studies.
  • (5) The prevalence of diabetes was 36% higher among San Antonio Mexican Americans than among Mexicans in Mexico City; this difference was highly statistically significant (age- and sex-adjusted prevalence ratio 1.36, P = 0.006).
  • (6) The prevalence was also higher in medium and heavy smokers.
  • (7) The interactions of 3 classical alpha-adrenergic antihypertensives of prevalently central type (St 155 or clonidine St 600; BR 750 or guanabenz) with the narcotic effects of pentobarbital have been investigated in the Mus musculus.
  • (8) The overall prevalence of protein energy malnutrition (PEM) was found to be 81.8%, while 31.8, 44.1, 5.7 and 0.2% of children had Grades I, II, III and IV PEM, respectively.
  • (9) Separation of PL by thin-layer chromatography revealed a prevalence of phosphatidylcholine followed by phosphatidylethanolamine.
  • (10) The most striking feature of some industrialized countries is a dramatic reduction of the prevalence of dental caries among school-aged children.
  • (11) The prevalence of these antibodies in contacts reached 50 to 70% in each of four age groups.
  • (12) A pilot study was undertaken to determine the prevalence of gas in the puerperal endometrial cavity and to determine whether this finding has any relationship to the mode of delivery or to the development of puerperal endometritis.
  • (13) Prevalence of LVH in the hypertensive population varies, mostly because of the different methods used for its diagnosis.
  • (14) The prevalence of greater than or equal to 1 mm ST-segment depression was 22% (symptomatic in 25%, and silent in 75%) and did not differ between groups with and without cardiac events.
  • (15) The authors compared the prevalence of atopy in 103 patients with lung cancer (a model of mucosal cancer), 51 patients with chronic obstructive pulmonary disease matched for age, sex, and smoking habits with patients with lung cancer, and 102 healthy control subjects.
  • (16) There was found an insignificant prevalance of the antibody avidity in the patients with the forms of the disease of moderate severity and severe.
  • (17) There was a rise of prevalence with age and higher-income groups.
  • (18) In the small ceramic workshops in the Gouda region, simple pneumoconiosis is still commonly present (13.3%), whereas the silicosis prevalence in the highly mechanized industries is low (1.7%).
  • (19) The prevalence of kola nut chewing and the effects attributed to it are briefly reviewed.
  • (20) These high Danish rates seem to reflect the true prevalence and incidence in the less serious types of progressive muscular dystrophy, probably because the Danish health system with free medical care and easy access to specialized hospital departments makes it possible to identify all cases of progressive muscular dystrophy.

Ratio


Definition:

  • (n.) The relation which one quantity or magnitude has to another of the same kind. It is expressed by the quotient of the division of the first by the second; thus, the ratio of 3 to 6 is expressed by / or /; of a to b by a/b; or (less commonly) the second term is made the dividend; as, a:b = b/a.
  • (n.) Hence, fixed relation of number, quantity, or degree; rate; proportion; as, the ratio of representation in Congress.

Example Sentences:

  • (1) In some other countries the patient-to-nurse ratio was significantly smaller.
  • (2) Increased dietary protein intake led to increased MDA per nephron, increased urinary excretion of MDA, and increased MDA per milligram protein in subtotally nephrectomized animals, and markedly increased the glutathione redox ratio.
  • (3) Children of smoking mothers had an 18.0 per cent cumulative incidence of post-infancy wheezing through 10 years of age, compared with 16.2 per cent among children of nonsmoking mothers (risk ratio 1.11, 95% CI: 1.02, 1.21).
  • (4) In X-irradiated litters, almost invariably, the incidence of anophthalmia was higher in exencephalic than in nonexencephalic embryos and the ratio of these incidences (relative risk) decreased toward 1 with increasing dose.
  • (5) Fluorination with [18F]acetylhypofluorite yields 6-[18F]fluoro-L-dopa with 95% radiochemical purity; fluorination of the same substrate with [18F]F2 yields a mixture of all three structural isomers in a ratio of 70:16:14 for 6-, 5-, and 2-fluoro compounds.
  • (6) A significant correlation was found between the amplitude ratio of the R2 and the sensitivity ratio of the rapid off-response at short and long wavelengths.
  • (7) In the present study, respirometric quotients, the ratio of oral air volume expended to total volume expended, were obtained using separate but simultaneous productions of oral and nasal airflow.
  • (8) Twitch-tetanus ratios were calculated and found not to be related to unit contraction time.6.
  • (9) For each temporal position of the independent noise, discriminability was a function of the ratio of the duration of the independent noise (tau) to the total burst duration.
  • (10) The estimated DNA compaction ratio (approximately 3-fold) is consistent with a significant degree of nucleosome unfolding in the hyperstimulated BR genes.
  • (11) This study was designed to examine the effect of the storage configuration of skin and the ratio of tissue-to-storage medium on the viability of skin stored under refrigeration.
  • (12) The ratios in both groups were also compared with the ratios of a large group of normal subjects evaluated in a population survey.
  • (13) Employed method of observation gave quantitative information about the influence of odours on ratios of basic predeterminate activities, insect distribution pattern and their tendency to choose zones with an odour.
  • (14) Men who ever farmed were at slightly elevated risk of non-Hodgkin's lymphoma (odds ratio = 1.2, 95% confidence interval = 1.0-1.5) that was not linked to specific crops or particular animals.
  • (15) Three effector: target ratios (6.2:1, 25:1, and 50:1) were studied in quadruplicate using 3, 4 and 5-h incubations.
  • (16) The prevalence of diabetes was 36% higher among San Antonio Mexican Americans than among Mexicans in Mexico City; this difference was highly statistically significant (age- and sex-adjusted prevalence ratio 1.36, P = 0.006).
  • (17) Cytosolic-to-mitochondrial ratios from maximal initial rates after correction for mitochondrial breakage were increased above controls in diabetic hearts for nucleoside diphosphokinase and aspartate aminotransferase.
  • (18) The distance of nucleoid sedimentation increased as a function of exposure temperature and exposure time, and was proportional to an increased protein to DNA ratio in the nucleoids.
  • (19) We have used a modification of the rotating-frame imaging technique to measure PCr-to-ATP ratio non-invasively in human heart.
  • (20) Odds ratios were computed by multiple logistic regression analysis and revealed no additional relationships; however, there were suggested dose-response gradients for height, weight at age 20, and body surface area in the Japanese women and for breast size in the Caucasian women.