Table 1.

Association of demographic characteristics with frequency of sexual intercourse over follow-up in the LIFE Study, 2005–2009 (n=469 couples).

Demographic Characteristics	Number of Couples	% Difference in Frequency of Sexual Intercourse (95% CI)1
Female Age, per yr		−2.5 (−3.7, −1.2)
<27 years	93	REF
28–30 years	175	−10.1 (−22.3, 4.0)
31–34 years	126	−22.6 (−33.8, −9.4)
≥35 years	75	−26.0 (−38.0, −11.7)
Male Age, per yr		−2.5 (−3.7, −1.2)
<27 years	57	REF
28–30 years	150	−3.0 (−18.9, 16.0)
31–34 years	130	−9.7 (−25.0, 8.7)
≥35 years	132	−19.0 (−33.8, −0.8)
Difference in Male and Female Age, per yr		−1.2 (−2.6, 0.2)
Female Age adjusting for Male Age, per yr		−0.8 (−3.1, 1.0)
Male Age adjusting for Female Age, per yr		−1.7 (−3.1, −0.3)
Female Race
Non-Hispanic white	385	REF
Other	84	16.0 (1.6, 32.5)
Male Race
Non-Hispanic white	390	REF
Other	79	15.6 (0.9, 32.3)
Female Highest Education
High School or Less	26	34.4 (7.0, 68.8)
Some College	84	9.2 (−4.5, 24.7)
College Graduate	359	REF
Male Highest Education
High School or Less	39	19.7 (−0.9, 44.7)
Some College	136	9.4 (−2.5, 22.7)
College Graduate	292	REF
Couple Household Income
< $29,999	17	24.5 (−6.5, 65.8)
$30,000–$49,999	55	−9.7 (−23.8, 7.0)
$50,000–$69,999	81	2.3 (−11.5, 18.2)
≥ $70,000	314	REF

¹Generalized linear mixed models with Poisson distribution and log link were used to estimate the % difference (95% CI) adjusting for female age (years), education level (high school or less, some college, college graduate), and regular exercise (yes, no), the difference between couple’s ages (years), and male employment (yes, no).