Table 2 Independent sample t-tests for responders and non-responders at age 40 (2017)

n

Mean

(SD)

n

Mean

(SD)

Mean difference

F-value

Two-tailed p-value

t- value

df

Breakfast regularity

448

3.60(0.68)

645

3.40(0.90)

− 0.20***

44.48

p <.001

-4.36

1070.43

LTPA

450

4.70(1.10)

635

4.70(1.20)

0.02

4.67

0.77

0.29

1028.55

Difficulties falling asleep

440

1.94(0.44)

612

1.83(0.54)

− 0.11***

15.18

p <.001

-3.75

1035.70

Alcohol consumption

449

2.73(1.17)

640

2.75(1.37)

0.02

14.95

0.76

0.29

1045.84

Smoking

449

1.72(0.90)

650

1.82(0.99)

0.10

7.18

0.08

1.78

1017.87