Statistics

Question 1

Definition of perinatal mortality rate

Answer 1

Total number of foetal deaths between 24 weeks gestation and 7 days of life in 1 year per 1000 total births (live and stillbirth)

Question 2

Neonatal mortality rate

Answer 2

number of children dying under 28 days divided by number of live births that year

Question 3

Infant mortality rate

Answer 3

Number of life newborns dying under 1 year per 1000 live births

Question 4

Maternal mortality rate

Answer 4

Number of women who die whilst pregnant or during first 42 days after termination of pregnancy per 100,000 maternities where the cause is related to or aggravated by pregnancy

Question 5

Sensitivity

Answer 5

True positive / (true positive + false negative)

Question 6

specificity

Answer 6

False negative / (false negative + true positive)

Question 7

PPV

Answer 7

True positive / true positive + false positive

Question 8

NPV

Answer 8

True negative / true negative + false negative

Question 9

Likelihood ratio

Answer 9

sensitivity / 1 - specificity