The objective of this study was to determine the effects of patient-based m
ammography screening strategies; We performed a meta-analysis and included
United States studies that met the following criteria: (a) randomized or co
ncurrent control design; (b) defined outcomes; and (c) data available for r
eanalysis. Interventions were classified as behavioral, cognitive, or socio
logical and further categorized by the type of control group (active versus
usual care), number of interventions, and mode of intervention (interactiv
e versus static). Data were combined using DerSimonian and Laird random eff
ects models to yield summary effect sizes. A total of 63 interventions in 4
3 studies met the inclusion criteria. Behavioral interventions increased sc
reening by 13.2% [95% confidence interval (CI), 4.7-21.2] compared with usu
al care, and by 13.0% (95% CI, 8.7-17.4) when using multiple strategies and
5.6% (95% CI, 0.6-1.6) when using a single intervention compared to active
: controls. Cognitive interventions using generic education strategies had
little impact on screening, but those that used theory based education (e.g
., health belief model) increased rates by 23.6% (95% CI, 16.4-30.1) compar
ed with usual care. Sociological interventions also increased screening rat
es. Interventions using a theoretical framework were the most effective in
increasing screening rates. The ability of these interventions to increase
screening among subgroups and improve rates of ongoing screening, as well a
s the costs of these strategies, is unknown and is an important area for fu
ture research.