Table 2: Estimated Proportion of Males Who are MSM for Individual Studies and Combined by Meta-analysis, by Behavioral Recall Period

Study Name Time Point Recall Period Estimated Prevalence Lower 95% CI Upper 95% CI
GSS 1988–2008 past year 3.2% 2.8% 3.7%
NHANES 1999–2008 past year 2.9% 2.1% 3.6%
NHSDA 1996 past year 2.3% 1.6% 3.1%
NHSLS 1992 past year 3.5% 2.1% 4.9%
NSBME 1999–2000 past year 2.6% 0.8% 4.4%
NSFG 2002–2003 past year 2.9% 2.2% 3.6%
Combined estimate past year 2.9% 2.6% 3.2%
GSS 1991–2008 past 5 years 3.8% 3.3% 4.3%
NHSLS 1992 past 5 years 4.1% 2.7% 5.5%
NSBME 1999–2000 past 5 years 4.3% 1.8% 6.8%
Project Hope 1988 past 5 years 6.2% 3.5% 9.0%
Combined estimate past 5 years 3.9% 3.5% 4.4%
NHANES 1999–2008 Ever 5.2% 4.4% 6.1%
NHSLS 1992 Ever 9.1% 7.6% 10.6%
NSBME 1999–2000 Ever 8.2% 4.9% 11.5%
NSFG 2002–2003 Ever 6.0% 5.0% 7.0%
Combined estimate Ever 6.9% 5.1% 8.6%

Notes:GSS: General Social Survey; NHANES: National Health and Nutrition Examination Survey; NHSDA: National Household Survey on Drug Abuse; NHSLS: National Health and Social Life Survey; NSBME: National STD and Behavior Measurement Experiment; NSFG: National Survey of Family Growth; Project Hope: Project Hope International Survey of AIDS-Risk Behaviors.