TABLE 1—

Mixed Model Meta-Analyses of Ageism Interventions for Primary and Secondary Outcomes: Worldwide, 1976–2018

		No. of Participants
Ageism Outcome	No. of Studies	Control Group	Intervention Group	Effect Size, dD (95% CI)
Attitudes toward aging	53	2404	2783	0.33 (0.25, 0.42)
Knowledge on aging	19	818	756	0.42 (0.27, 0.57)
Comfort with older adults	9	286	348	0.50 (0.27, 0.57)
Anxiety about own aging	5	217	267	0.13 (−0.13, 0.38)
Working with older adults	6	388	375	−0·09 (−0.30, 0.12)

Note. CI = confidence interval; d_D = differences of standardized mean differences.