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Table 2 Comparison of insomnia symptoms by each type of activity engagement (N = 3321)

From: Relationships among types of activity engagement and insomnia symptoms among older adults

Types of activity

Group

Insomnia symptoms

Mean (SD)

t

p

Social activity

High-level group (n = 1833)

6.48 (2.00)

7.43

<  0.001

Low-level group (n = 1479)

7.01 (2.09)

Cognitive activity

High-level group (n = 2008)

6.56 (2.02)

5.57

<  0.001

Low-level group (n = 1306)

6.96 (2.10)

Physical activity

High-level group (n = 2198)

6.54 (2.00)

7.20

<  0.001

Low-level group (n = 1107)

7.08 (2.12)

  1. SD standard deviation
  2. Total respondents were classified into two groups (high level vs. low level) according to the median value of each type of activity engagement