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Table 1 Sample size determination

From: Risk factors associated with hypertensive disorders in pregnancy in Nekemte referral hospital, from July 2015 to June 2017, Ethiopia: case-control study

Relevant factors

Expected frequency of exposure among control

OR

Case

Control

Total Sample

Diabetes

9%

2.4

243

485

728

Prime gravid

28.08%

2.1–3

116

232

348

Age (> 35 years old)

31.3%

4.5

136

272

408