Skip to main content

Table 1 Selected characteristics of study participants

From: Pilot test and validation of the Peak Day method of prospective determination of ovulation against a handheld urine hormone monitor

 

Total mean ± SD, or n(%) n = 58

Pilot mean ± SD, or n(%) n = 32

Validation mean ± SD, or n(%) n = 26

Age*

28.1 ± 5.8

29.1 ± 4.5

26.8 ± 7.2

BMI

23.8 ± 5.5

23.7 ± 4.5

23.9 ± 6.9

<18.5

5 (8.6)

2 (6.3)

3 (11.5)

18.5-24.9

34 (58.6)

20 (62.5)

14 (53.9)

25.0-29.9

6 (10.3)

5 (15.6)

1 (3.8)

≥30

8 (13.8)

4 (12.5)

4 (15.4)

Missing

5 (8.6)

1 (3.1)

4 (15.4)

Physical activity

3.2 ± 1.4

3.1 ± 1.3

3.4 ± 1.5

Age at menarche

12.5 ± 1.5

12.7 ± 1.4

12.4 ± 1.8

Gravidity

0.8 ± 1.2

1.0 ± 1.5

0.4 ± 0.6

Parity

0.8 ± 1.1

1.0 ± 1.3

0.5 ± 0.5

Race

   

Non-Hispanic White

50 (86.2)

29 (90.6)

21 (80.8)

Hispanic White

2 (3.5)

1 (3.1)

1 (3.8)

Other/Multiracial£

1 (1.7)

0

1 (3.8)

Missing

5 (8.6)

2 (6.2)

3 (11.5)

Employment

   

Employed for wages

27 (46.5)

14 (43.8)

13 (50.0)

Self-employed

4 (6.9)

3 (9.4)

1 (3.8)

Homemaker

15 (25.9)

9 (28.1)

6 (23.1)

Student

6 (10.3)

4 (12.5)

2 (7.7)

Unemployed/other

3 (5.2)

1 (3.1)

2 (7.7)

Missing

3 (5.2)

1 (3.1)

2 (7.7)

Education

   

High School/GED or < High School

9 (15.5)

6 (18.7)

3 (11.5)

College graduate

45 (77.6)

24 (75.0)

21 (80.8)

Missing

4 (6.9)

2 (6.3)

2 (7.7)

  1. *Age in years.
  2. Body Mass Index: weight (kg)/height (m)2.
  3. Number of days per week.
  4. £Includes Asian, Black/African American, Pacific Islander, American Indian/Alaskan Native.