Question

1. Instructions: Create a two by two table with correct labels, appropriate numbers and title in Microsoft Excel with the information listed below and post in Microsoft Word (1 point):

1. Title: Table 1 – Baseline characteristics of participants by prospective development of gestational diabetes:
2. 72 Chinese women with a family history of gestational diabetes:
3. 1013 Chinese women without a family history of gestational diabetes:
4. 19 Chinese women with a family history of gestational diabetes who developed gestational diabetes:
5. 136 Chinese women without a family history of gestational diabetes who developed gestational diabetes:

2. Calculate the risk ratio of developing gestational diabetes among pregnant women due to family history of gestational diabetes (0.5 points)

3. Interpret the results (0.5 points)

(Epidemiology)

Answer 1

Table 1 – Baseline characteristics of participants by prospective development of gestational diabetes

Family history of gestational diabetes	Developed gestational diabetes	Didnot develop gestational diabetes
Yes	19	53
No	136	877

Risk ratio- Using this ratio, the risk is compared among two groups. It is the ratio of cumulative occurrence of one event in 1st group to cumulative occurrence of the same event in 2nd group. Mostly 1st group is the exposed group and the 2nd group is the unexposed one.

The risk ratio calculates the risk of happening of a event when person is exposed to that of non exposed. We will see more of it during interpretation.

Now, let's calculate risk ratio. Here the exposure is having family history of gestational diabetes and event is developing gestational diabetes.

Cumulative occurrence of gestational diabetes with family history (C1)

= Chinese women who developed gestational diabetes/ total chinese women with family history of gestational diabetes

= 19/72 =0.264

Cumulative occurrence of gestational diabetes without family history (C2)

= Chinese women who developed gestational diabetes / total chinese women without family history of gestational diabetes

= 136 /1013 =0.134

Risk ratio = C1 / C2 = 0.264 / 0.134 = 1.97

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Interpretation:- Chinese women with family history of gestational diabetes has 1.97 times the risk of developing gestational diabetes than the Chinese women without family history of gestational diabetes.