TABLE 3.

Association between Lf and other factors by linear regression modelsa

VariableUnivariate analysis slope (P value)Multivariate analysis regression coefficient (P value)
Analysis 1Analysis 2Analysis 1Analysis 2
Cohort44.0 (0.007)49.0 (0.001)
Erythrocytes in CVL14.5 (0.03)13.5 (0.03)
Leukocytes in CVL27.4 (0.0002)29.6 (<0.0001)29.5 (<0.0001)30.1 (<0.0001)
Semen in CVL33.9 (0.23)18.1 (0.52)
STDs37.7 (0.05)21.4 (0.29)
Risky sexb22.3 (0.18)0.05 (1.00)
BV60.8 (0.004)47.3 (0.03)
Vaginitisc62.2 (0.0001)52.9 (0.004)
Race31.3 (0.16)1.9 (0.94)
Age1.4 (0.09)−0.57(0.63)
Phase of menstrual cycledNA (0.91)NA (0.08)
Day in menstrual cycle0.01 (0.31)0.01 (0.48)
Ever used crack, cocaine, or heroin44.4 (0.006)25.7 (0.50)
Use of crack in past 6 mo44.7 (0.004)30.3 (0.17)
Crack use frequency in last 6 mo8.0 (0.01)4.4 (0.27)
Lifetime no. of male sex partners0.01 (0.72)−0.02 (0.42)
No. of male partners in past 5 yr0.02 (0.67)−0.03 (0.50)
No. of male partners in last 6 mo0.01 (0.87)−0.05 (0.55)
Exchanging sex for drugs, money, or shelter42.6 (0.007)18.3 (0.68)45.9 (0.002)
  • a Analysis 1, not adjusted for cohort; analysis 2, adjusted for cohort. The variables included in the multivariate analyses were selected by the stepwise selection procedure. A blank entry for a variable in the multivariate analysis results means that the variable was not selected into the model on the basis of an inclusion and exclusion criterion (P < 0.05). NA, not applicable.

  • b Risky sex is defined as having more than five sex partners in 6 months and seldom or never using condoms.

  • c Vaginitis definition includes Trichomonas infection and BV.

  • d Phase of cycle was categorized on the basis of days following the last menstrual period as proliferative or luteal. The proliferative phase was defined as the first 15 days after a menstrual period.