Table 3

Relation between physical leisure time activities at baseline and prevalence of persistent fatigue (always or usually fatigued during daytime) at the 15 month follow up in respondents without persistent fatigue at baseline

Physical leisure time activities at baseline	N	Persistent fatigue at follow up
Physical leisure time activities at baseline	N	% (n)	OR (95% CI)	Adj OR (95% CI)
N, Total number of subjects in each category; n, number of cases in each category; %, proportion of cases in each category; OR, crude odds ratio; 95% CI, 95% confidence interval; Adj OR, odds ratio adjusted for age, baseline health characteristics (level of fitness, affective symptoms, sleeping problems, musculoskeletal pain, widespread pain, long term health problems of any kind), daily consumption of cigarettes, former smoking, number of preschool children, engagement with special tasks of a caring nature during leisure time, number of hours worked a week, frequency of night shifts, quantitative work demands, positive challenges in the job, the extent to which the work required physical endurance, the extent to which the culture in the work unit was supportive and encouraging, and personal engagement in the work unit, in logistic regression analysis (N = 3971. Overall rate of correct classification = 90.1%. Hosmer-Lemeshow test: χ² = 6.823; df = 8; p = 0.56.).
Area under the ROC curve = 0.95.
p<0.10; p<0.05; **p<0.01; §p = 0.19; ¶p = 0.43.
†As the only activity.
‡As the only activity or in combination with slow walks.
No regular exercise	1080	13.1 (141)	1.00	1.00
Slow walks†	815	11.4 (93)	0.86 (0.65 to 1.13)	0.80 (0.58 to 1.12)§
Brisk walks‡	968	9.7 (94)	0.72 (0.54 to 0.94)**	0.66 (0.48 to 0.91)**
Aerobics or gymnastics‡	269	8.9 (24)	0.65 (0.41 to 1.03)*	0.81 (0.49 to 1.35)¶
Other regular exercise	1315	8.4 (111)	0.61 (0.47 to 0.80)***	0.64 (0.47 to 0.87)***
Any regular exercise	3367	9.6 (322)	0.70 (0.57 to 0.87)***	0.70 (0.55 to 0.89)***