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Table 7 The intervention’s effect size on knowledge, stress level, and psychological wellbeing mean scores of caregivers of Alzheimer’s older adults

From: Effect of psychological first aid program on stress level and psychological well-being among caregivers of older adults with alzheimer’s disease

Items

Study Group (N = 100)

Mean Change

Effect size

Before

After

Mean ± SD

Mean ± SD

Caregivers’ Alzheimer disease knowledge level

13.02 ± 4.304

27.43 ± 1.273

-14.410

1.11

Caregivers’ stress level

27.50 ± 9.482

18.92 ± 3.569

8.580

3.12

Caregivers’ psychological wellbeing

35.96 ± 9.143

40.71 ± 4.785

-4.750

1.32

  1. Effect size 0.0-0.2 Small effect 0.3–0.7 Medium effect ≥ 0.8 Large effect