Table 1: Comparison of participants' menstrual changes with the COVID-19 vaccine type.

 

Menstruation change

Pfizer-BioNTech             

 (n:533)

Sinovac

(n:60)

Toplam

(n:593)

Test value

n

%

n

%

n

%

X2/t

p

Side effect of the vaccine

Yes

192

36.0

7

11.7

199

33.6

14.348

0.000

No

341

64.0

53

88.3

394

66.4

Post-vaccine dysmenorrhea

Yes

395

74.1

45

75.0

440

74.2

0.022

0.881

No

138

25.9

15

25.0

153

25.8

Post-vaccine dysmenorrhea time

During menstruation after the first vaccination

318

59.7

39

65.0

357

60.2

 

 

1.034

 

 

0.596

 

During menstruation after the second vaccination

77

14.4

6

10.0

83

14.0

No post-vaccine dysmenorrhea

138

25.9

15

25.0

153

25.8

Effect of the vaccine on the menstrual cycle

Yes

137

25.7

10

16.7

147

24.8

2.362

0.432

No

396

74.3

50

83.3

446

75.2

Increase in menstrual days after vaccination

 

 

Yes

59

11.1

5

8.3

64

10.8

0.419

0.517

No

474

88.9

55

91.7

529

89.2

Increase in menstrual bleeding after vaccination

 

 

Yes

66

12.4

4

6.7

70

11.8

1.693

0.193

No

467

87.6

56

93.3

523

88.2

                   

*X2: Chi-square analysis, t: Independent Samples Test, p < 0.05