Table 1. Differences in participant demographics of fertile and subfertile women.
Parameters Fertile
(n=250)
Subfertile
(n=250)
p-value
Age (years) * 28.5±4.8 35.8±5.2 < 0.001
Years lived with partner 2.4 (1.1 - 6.0) 5.0 (3.0 - 10.0) < 0.001
Years tried to conceive 2.3 (2.2 - 2.6) 3.0 (2.7 - 3.3) < 0.001
Education
Under bachelor’s degree
Bachelor’s degree
Higher than a bachelor’s degree

82 (32.8)
158 (63.2)
10 (4.0)

63 (25.2)
140 (56.0)
47 (18.8)

0.061
0.101
<0.001
Occupation
Government officer
Private officer
Personal business
Others

36 (14.4)
100 (40.0)
48 (19.2)
66 (26.4)

73 (29.2)
45 (18.0)
84 (33.6)
48 (19.2)

<0.001
<0.001
<0.001
0.055
Income per month (baht)
≤ 10,000
10,001-20,000
20,001-30,000
> 30,000

40 (16.0)
141 (56.4)
54 (21.6)
15 (6.0)

21 (8.4)
83 (33.2)
76 (30.4)
70 (28.0)

0.010
< 0.001
0.025
< 0.001
Religion
Buddhist
Christian
Muslim
Others

220 (88.0)
25 (10.0)
4 (1.6)
1 (0.4)

225 (90.0)
23 (9.2)
2 (0.8)
0

0.476
0.762
0.413
0.319

Values are frequency, n (%), Chi-square test, unless otherwise stated
* Mean±standard deviation, t-test
Median (interquartile range), Mann-Whitney U test
US Dollar conversion rate was 36 baht to 1 US Dollar at the time of data collection