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.