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Table 3 Sleeping habits among adolescent female football players at baseline and at the 1-year follow-up

From: Lifestyle characteristics in adolescent female football players: data from the Karolinska football Injury Cohort

 

Total cohort

(12–17 years)

Total cohort divided into age groups

Sub-cohort (12–17 years)a

Baseline vs.

Follow-Up

n

n = 419

12 years

(n = 97)

13 years

(n = 157)

14 years

(n = 91)

15–17

(n = 73)

Baseline

(n = 286)

Follow-Up

(n = 286)

P value

Sleeping hours

402

8.3 ± 0.8

8.7 ± 0.8

8.4 ± 0.7

8.0 ± 0.9

7.8 ± 0.8

8.3 ± 0.8

 6–7.5 h

 

65 (16)

5 (5)

15 (10)

23 (26)

22 (34)

44 (16)

 

 8 h

 

169 (42)

34 (35)

72 (47)

35 (40)

28 (43)

112 (40)

 

 8.5–10 h

 

168 (42)

58 (60)

65 (43)

30 (34)

15 (23)

123 (44)

 

Sleeping problems: go back to sleep

419

       

0.111

 Never

 

88 (21)

26 (27)

32 (20)

18 (20)

12 (16)

60 (21)

46 (16)

 

 Rarely, few times/year

 

138 (33)

31 (32)

51 (32)

34 (37)

22 (30)

92 (32)

86 (30)

 

 Some few times/months

 

129 (31)

23 (24)

51 (32)

27 (30)

28 (38)

95 (33)

108 (38)

 

 Several times/week

 

58 (14)

14 (14)

23 (15)

11 (12)

10 (14)

36 (13)

38 (13)

 

 Every day

 

6 (1)

3 (3)

1 (1)

1 (1)

1 (1)

3 (1)

7 (3)

 

Sleeping problems: woke up

417

       

0.576

 Never

 

160 (38)

34 (35)

64 (41)

33 (36)

29 (40)

108 (38)

109 (38)

 

 Rarely, few times/year

 

177 (42)

39 (41)

60 (38)

42 (46)

36 (49)

123 (43)

115 (40)

 

 Some few times/months

 

68 (16)

20 (21)

29 (18)

13 (14)

6 (8)

48 (17)

46 (16)

 

 Several times/week

 

10 (2)

3 (3)

4 (3)

2 (2)

1 (1)

5 (2)

12 (4)

 

 Every day

 

2 (1)

0 (0)

0 (0)

1 (1)

1 (1)

1 (0)

3 (1)

 

Feel tired in daily activities

417

       

0.025

 Never

 

47 (11)

16 (16)

22 (14)

8 (9)

1 (1)

31 (11)

21 (7)

 

 Rarely, few times/year

 

149 (36)

42 (43)

59 (38)

31 (34)

17 (23)

100 (35)

73 (25)

 

 Some few times/months

 

131 (31)

22 (23)

52 (33)

35 (39)

22 (30)

97 (34)

116 (41)

 

 Several times/week

 

70 (17)

16 (16)

20 (13)

10 (11)

24 (33)

44 (15)

59 (21)

 

 Every day

 

20 (5)

1 (1)

4 (2)

6 (7)

9 (12)

13 (5)

17 (6)

 

Impaired sleep with daytime consequences

419

34 (8)

7 (7)

8 (5)

8 (9)

11 (15)

19 (7)

25 (9)

0.327

Impaired sleep without daytime consequence

419

31 (7)

8 (8)

18 (11)

4 (4)

1 (1)

21 (7)

26 (9)

0.522

  1. Values are reported as mean, standard deviations or n (%). P values in bold type are significant. –, data not collected
  2. aMissing value from 0–1 player for the different questions both at baseline and at follow-up. Seven missing answers at baseline regarding sleeping hours