Table 3

Distribution of selected SF-36 combined measures by group and time period.

Baseline

Study End (3 months)

% change

Unpaired ttest (df = 67)

Paired ttest (df = 22)

Paired ttest (df = 45)

Unpaired ttest (df = 67)

Item No.

Description

Control (n = 23)

Intervention (n = 46)

Control (n = 23)

Intervention (n = 46)

Control

Intervention

Baseline comparison

Control change

Intervention change

3 month comparison

mean (SD)

mean (SD)

mean (SD)

mean (SD)

t statistic

t statistic

t statistic

t statistic

GH

General Health

65.5 (22.4)

67.8 (20.5)

70.3 (22.0)

73.8 (17.0)

7.4

8.7

-0.44

-1.57

-2.33

-0.25

V

Vitality

43.2 (23.5)

48.4 (20.4)

50.5 (19.0)

62.1 (17.1)

17.0

28.4

-0.94

-1.95

-4.44**

-1.25

SF

Social Functioning

63.6 (27.7)

75.0 (25.4)

81.0 (19.5)

85.6 (17.7)

27.4

14.1

-1.71

-3.35*

-3.09

1.11

RE

Role Emotional

77.5 (29.1)

80.8 (23.8)

80.4 (27.9)

86.1 (19.5)

3.7

6.5

-0.50

-0.56

-1.53

-0.39

MH

Mental Health

62.8 (22.2)

64.3 (20.5)

67.8 (16.8)

73.3 (15.8)

8.0

13.9

-0.28

-1.78

-3.42*

-0.93

* = p < 0.05, ** = p < 0.001 equivalent after applying Bonferroni correction

Mills et al. Journal of Circadian Rhythms 2007 5:2   doi:10.1186/1740-3391-5-2