Table 2.

Factor loadings for each item of CFKS-J in the General (n = 4,328) and Triers (n = 618) group

		Factor loading a
	Item	General group	Triers group
1	A woman is less fertile after the age of 36 years. [True]	0.62	0.58
2	A couple would be classified as infertile if they did not achieve a pregnancy after one year of regular sexual intercourse without using contraception. [True]	0.40	0.32
3	Smoking decreases female fertility. [True]	0.63	0.63
4	Smoking decreases male fertility. [True]	0.67	0.66
5	About 1 in 10 couples are infertile. [True]	0.56	0.63
6	If a man produces sperm he is fertile. [False]	0.53	0.59
7	These days a woman in her 40s has a similar chance of getting pregnant as a woman in her 30s. [False]	0.59	0.67
8	Having a healthy lifestyle makes you fertile. [False]	0.65	0.72
9	If a man has had mumps after puberty he is more likely to later have a fertility problem. [True]	0.44	0.38
10	A woman who never menstruates is still fertile. [False]	0.30	0.34
11	If a woman is overweight by more than 13 kg then she may not be able to get pregnant. [True]	0.54	0.51
12	If a man can achieve an erection then it is an indication that he is fertile. [False]	0.66	0.66
13	People who have had a sexually transmitted disease are likely to have reduced fertility. [True]	0.60	0.55

^aOnly factor loadings for the first factor shown.