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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Biometrics. 2012 Sep 24;69(1):214–224. doi: 10.1111/j.1541-0420.2012.01807.x

Table 1.

Seroadaptive behavior comparison. Comparison group is white men who have sex with men (MSM) at baseline that are less than 40 years old from Los Angeles who did not graduate high school and were out of work with no history of hard drug use. For each group, we evaluated the serodiscordant partner selection (SPARM), serodiscordant activity multiple (SAM), and the serodiscordant protection multiple (SPROM).

Seroadaptive measures SPARM SAM SPROM
 Comparison group 1.50 (1.09, 1.99) 0.78 (0.56, 1.07) 1.48 (1.22, 1.77)*

Time
 Followup 1 1.55 (1.10, 2.09) 0.74 (0.52, 1.03) 1.71 (1.36, 2.14)*
 Followup 2 1.56 (1.10, 2.12) 0.67 (0.46, 0.93)* 1.80 (1.41, 2.28)*
 Followup 3 1.58 (1.11, 2.16) 0.73 (0.51, 1.02) 1.69 (1.30, 2.15)*
 Followup 4 1.47 (1.05, 2.00) 0.72 (0.50, 1.00)* 1.82 (1.39, 2.32)*
 Followup 5 1.32 (0.93, 1.78) 0.88 (0.60, 1.23) 1.87 (1.44, 2.39)*

Treatment (Trt)
 Trt Baseline 1.55 (1.10, 2.10) 0.82 (0.59, 1.13) 1.42 (1.16, 1.73)*
 Trt Followup 1 1.48 (1.05, 2.03) 0.80 (0.56, 1.12) 1.62 (1.28, 2.03)*
 Trt Followup 2 1.39 (0.98, 1.91) 0.82 (0.57, 1.15) 1.82 (1.42, 2.32)*
 Trt Followup 3 1.41 (1.00, 1.94) 0.82 (0.56, 1.15) 1.91 (1.47, 2.49)*
 Trt Followup 4 1.23 (0.87, 1.69) 0.90 (0.61, 1.27) 1.83 (1.33, 2.44)*
 Trt Followup 5 1.35 (0.95, 1.87) 0.88 (0.58, 1.24) 1.75 (1.31, 2.30)*

Risk Group
 FEM 4.26 (2.89, 5.93) 0.72 (0.49, 1.02) 1.44 (1.14, 1.73)*
 HTM 2.05 (1.37, 2.93) 0.86 (0.56, 1.28) 1.48 (1.08, 1.95)*
 IDU 0.96 (0.65, 1.34) 0.69 (0.45, 1.00)* 1.31 (1.10, 1.54)*

Race
 Black 1.35 (0.99, 1.79) 0.79 (0.58, 1.05) 1.27 (1.01, 1.57)*
 Hispanic 2.02 (1.47, 2.72) 0.75 (0.55, 1.01) 1.52 (1.18, 1.92)*
 Other 1.59 (1.07, 2.28) 0.75 (0.51, 1.06) 1.53 (1.18, 1.93)*

Location
 Milwaukee 3.16 (2.09, 4.65) 0.76 (0.49, 1.11) 1.58 (1.26, 1.93)*
 New York 1.36 (0.95, 1.87) 0.89 (0.63, 1.25) 1.64 (1.27, 2.02)*
 San Francisco 1.77 (1.26, 2.37) 0.82 (0.58, 1.13) 1.51 (1.25, 1.81)*

Values of SAM and SPROM with * indicate statistically significant evidence for seroadaptation.

Values in bold are significantly different from the value in the comparison group.