Despite the advantages of the case study method, its reliability and validity remain in doubt. Tests to establish the validity and reliability of qualitative data are important to determine the stability and quality of the data obtained. However, there is no single, coherent set of validity and reliability tests for each research phase in case study research available in the literature. This article presents an argument for the case study method in marketing research, examining various criteria for judging the quality of the method and highlighting various techniques, which can be addressed to achieve objectivity, and rigorous and relevant information for planning to marketing actions. The purpose of this article is to invite further research by discussing the use of various scientific techniques for establishing the validity and reliability in case study research. The article provides guidelines for achieving high validity and reliability for each phase in case study research.

Question 1

In the chapter on diabetes you wrote that you should avoid tablets

before age of 40 years in non-insulin-dependent diabetes mellitus

(NIDDM). Why is this, because in our country most doctors are

prescribing this?213019

Question 2

1. Should a patient poorly controlled on glibenclamide 15 mg a day and

metformin 1500 mg a day be moved onto insulin?

2. What are the indications for insulin in type 2 diabetics?

Question 3

What happens to the insulin-secreting capacity of a type 2 diabetic

placed on insulin therapy earlier than recommended? Can the external

supply of insulin improve the functional capacity of the insulin-secreting

cells, to some extent by providing some rest to these cells?

Question 4

1. Is inhaled insulin a suitable substitute for injectable insulin?

2. Is there, or will there soon be, insulin in the form of a tablet?

Question 5

What are the complications of insulin other than hypoglycaemia and

injection?

Question 6

I would like to know the processes that go into administering the

Alberti's/modified Alberti's regime in patients with uncontrolled

diabetes mellitus.

Question 7

Is there any role for steroids in the management of resistant diabetes

mellitus (daily insulin requirement exceeding 100 units/day)? Don't they

make glycaemic control worse?

Question 8

What is the importance of potassium chloride (KCl) in the treatment of a

diabetic patient (pre-operative care)? The formula in the text is explained

as 16 U of insulin10 mmol of KCl500 mL 10% glucose.

Question 9

What is the cut-off point of daily albumin excretion above which a

diabetic patient without hypertension should be given an angiotensinconverting enzyme (ACE) inhibitor?

Question 10

What is the urinary concentration or 24-hour urine albumin content above

which angiotensin-converting enzyme (ACE) inhibitors should be started

in diabetic patients? Does an albumin (in microgram)/creatinine (in

milligrams) ratio above 30 in the morning sample indicate a need for this?