Biostatistics: multiple linear regression: practice question

A PSM question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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PSM · Biostatistics: multiple linear regression

Sample item

Investigators want to predict birth weight, a continuous measurement, from maternal age, body mass index and haemoglobin, all considered together. Which technique is suitable?

AChi-square test for trendBMultiple linear regressionCKaplan-Meier analysisDSimple linear regression

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. Multiple linear regression

Multiple linear regression relates a continuous outcome to several predictors at once and gives an adjusted coefficient for each. Simple linear regression has only one predictor. Kaplan-Meier analysis handles time-to-event data, and the chi-square test handles categorical variables.

Option by option

A. Chi-square test for trend
The chi-square test for trend is for categorical data.
B. Multiple linear regression (correct)
Correct. A continuous outcome with several predictors calls for multiple linear regression.
C. Kaplan-Meier analysis
Kaplan-Meier analysis estimates survival and does not predict a continuous outcome.
D. Simple linear regression
Simple linear regression includes a single predictor only.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this PSM question

What is the answer to this PSM question?

The best answer is B, Multiple linear regression. Multiple linear regression relates a continuous outcome to several predictors at once and gives an adjusted coefficient for each.

Why is "Chi-square test for trend" not the answer?

The chi-square test for trend is for categorical data.

Why is "Kaplan-Meier analysis" not the answer?

Kaplan-Meier analysis estimates survival and does not predict a continuous outcome.

Why is "Simple linear regression" not the answer?

Simple linear regression includes a single predictor only.

What concept does this question test?

It tests Biostatistics: multiple linear regression in PSM. Simple linear regression has only one predictor. Kaplan-Meier analysis handles time-to-event data, and the chi-square test handles categorical variables.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Biostatistics: multiple linear regression?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.