Which of the following is a limitation of secondary data not found in primary data

Obesity[ edit ] Obesity is a major risk factor for a wide variety of conditions including cardiovascular diseases, hypertension, certain cancers, and type 2 diabetes. In order to prevent obesity, it is recommended that individuals adhere to a consistent exercise regimen as well as a nutritious and balanced diet. The medical system in our society is geared toward curing acute symptoms of disease after the fact that they have brought us into the emergency room. An ongoing epidemic within American culture is the prevalence of obesity.

Which of the following is a limitation of secondary data not found in primary data

Topical lifitegrast ophthalmic solution Background Dry eyes, also known as dry eye syndrome, dysfunctional tear syndrome, keratitis sicca, keratoconjunctivitis sicca, xerophthalmia, xerosis or sicca syndrome, refers to chronic dryness, inflammation and irritation of the cornea and conjunctiva.

Dry eye syndrome occurs when the eye cannot maintain a normal layer of tears to coat the cornea and conjunctiva. Tear fluid provides lubrication to cleanse and moisten the surface of the eye and contains enzymes which protect the eye against bacteria.

Dry eye syndrome is generally classified as mild, moderate or severe. Although most individuals with dry eyes will experience discomfort, some may be relatively asymptomatic or notice symptoms intermittently. In severe cases, the cornea may become damaged or infected and lead to vision loss.

Slit lamp evaluation is used to examine and assess the conjunctiva, cornea and eyelids. All are usually performed by ophthalmologists. Tear production may be measured using the Schirmer test. A small piece of sterile filter paper, supplied in a standard kit, is placed in the lateral third of the lower eyelid.

The extent of wetting in a given time is measured. Use of topical anesthesia and blotting of the tear reservoir prior to the test may improve accuracy as a measure of basal tear production. The findings are typically similar in both eyes.

End-organ damage to conjunctival and corneal epithelial cells may be assessed by ocular surface staining, which stains areas of devitalized tissue. Rose bengal, lissamine green, or fluorescein dyes may be used to assess the ocular surface.

The patient is asked to blink twice to spread the stain over the conjunctiva and cornea. Staining can then be scored by the ophthalmologist using a slit lamp. A pattern of exposure zone interpalpebral corneal and bulbar conjunctival staining is typically seen with aqueous tear deficiency.

Lissamine green dye has a staining profile similar to that of rose bengal and may cause less ocular irritation. It is not recommended for evaluating corneal epithelial disease. Fluorescien dye stains areas of the corneal and conunctival epithelia where there is sufficient disruption of intercellular junctions to allow the dye to permeate into the tissue.

One to 2 mins after instilling the eye, the ocular surface is examined through a biomicroscope using a cobalt blue filter. Staining is more intense when it is observed with a yellow filter.

Mild fluoresceein staining can be observed in normal eyes and may be more prominent in the morning. Exposure-zone punctate or blotchy fluorescein staining is observed in dry eye, and staining is more easily visualized on the cornea than on the conjunctiva.

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The TFBUT or tear clearance provides a global assessment of the function of the lacrimal functional unit and tear exchange on the ocular surface. The test is performed by measuring break-up time and tear osmolality after instillation of fluorescein eye stain. Blinking spreads the dye to coat the tear film protective layer of the eye.

The eye is then examined under a blue light. Break-up times less than 10 seconds are considered abnormal. A number of other tests have also been used.

Which of the following is a limitation of secondary data not found in primary data

The red thread is placed into the lower eyelid, the eyes are gently closed and after approximately five minutes, the thread is removed and evaluated for moisture. Tear osmolarity is the measurement of the salt concentration in the tear fluid.

Tear osmolarity is considered a key point in dry eye disease DED and its measurement is the gold standard in the diagnosis of dry eye.

Which of the following is a limitation of secondary data not found in primary data

A total fo consecutive subjects between the ages of 18 and 82 years were recruited from the general patient population, of which qualified with complete datasets.Data Compression Explained. Matt Mahoney. Copyright (C) , Dell, feelthefish.com are permitted to copy and distribute material from this book provided (1) any.

Primary data collection is designed to collect the information thatthe organization wants to know and consultants report it in ways that benefit the feelthefish.com example, while information reported with secondary data may not fit the organizations’needs, no such problem exists with primary data collection since consultants get data from.

Secondary data refers to data which is collected by someone who is someone other than the user.

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Common sources of secondary data for social science include censuses, information collected by government departments, organizational records and data that was originally collected for other research purposes. Primary data, by contrast, are collected by the investigator conducting the research. To access the new Vendor Information Pages (VIP) you must select one of the options available through AccessVA login: Veteran Small Business Owners: DS Login: Veterans (including Veterans Small Business Owners (Veteran Owned Small Business (VOSB) or Service Disabled Veteran Owned Small Business (SDVOSB) or their business representatives who are also Veterans.

Preventive healthcare (alternately preventive medicine, preventative healthcare/medicine, or prophylaxis) consists of measures taken for disease prevention, as opposed to disease treatment. Just as health comprises a variety of physical and mental states, so do disease and disability, which are affected by environmental factors, genetic predisposition, disease agents, and lifestyle choices.

Subpart —Federal Supply Schedules Definitions. As used in this subpart— “Ordering activity” means an activity that is authorized to place orders, or establish blanket purchase agreements (BPA), against the General Services Administration’s (GSA) Multiple Award Schedule contracts.

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