An investigator reviewed 700 singleton birth records that occurred during the pa

Question

An investigator reviewed 700 singleton birth records that occurred during the past 5 years in St.Catharines General hospital. A total of 56 records were identified as low birth weight infants (birth weight less than 2500 grams). He also identified another 56 infants whose birth weight were higher than 2500 grams, but who was born at the same day with the same sex as the one in low birth weight group. Each infant's mother was interviewed to examine whether cigarette smoking exposure was associated with the fetus' birth weight. A) WHAT TYPE OF RESEARCH STUDY IS THIS B) HOW MANY VARIABLES ARE INVOLVED IN THIS STUDY? WHAT ARE THEY? C) WHAT ARE THE MEASUREMENT SCALES FOR THESE FACTORS? EX NOMINAL, ORDINAL, INTERVAL, RATIO

Explanation / Answer

A) We know that in an observational study the investigators do not assign any treatments but observe subjects and measures variables of interest without assigning treatments to the subject. Here we find the same type of study when investigators reviewed 700 singleton birth records that occurred during the past 5 years so this is an observational study.

B) Here we have 5 variables and they are as below:

C) Year – Interval

Date – Interval

Birth weight – Ratio

Sex – Nominal

Smoking habit – Nominal

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.