Character

OR (95% CI)

p value

Insomnia symptom (ref: no)

Difficulty falling sleep

1.42 (1.09 - 1.86)

0.01^*

Difficulty staying sleep

0.89 (0.64 - 1.24)

0.38

Non-refreshing sleep

0.85 (0.46 - 1.59)

0.45

Frequent awaking from sleep or dreams

1.32 (0.89 - 1.95)

0.20

Insomnia duration (ref: no)

Less than 1 month

1.00 (0.60 - 1.66)

0.99

1 month - 1/2 year

1.34 (0.74 - 2.4)

0.34

1/2 year - 1 year

1.23 (0.73 - 2.07)

0.43

1 year - 3 years

1.20 (0.78 - 1.83)

0.41

More than 3 years

1.28 (0.92 - 1.78)

0.14