Table 1. Demographics and summary data for gastrointestinal symptoms, physical exercise and SF-12 scores.

Data are presented as mean (SEM)

	Overall (N=3228)	Normal sleep reported (n=2686)	Abnormal sleep reported (n=542)
Age	52.7±0.3	53±0.3	51.5±0.7
Gender (% female)	49	47	60
BMI (kg/m2)	27.5±0.1	27.4±0.1	28.3±0.3
GI symptom score	1.53±0.01	1.46±0.01	1.87±0.03
Lower GI Score	1.54±0.01	1.48±0.01	1.84±0.03
Upper GI Score	1.52±0.01	1.44±0.01	1.90±0.03
Physical exercise score	9.7±0.1	9.9±0.1	8.7±0.2
SF-12 physical score	50.1±0.2	50.8±0.2	46.9±0.5
SF-12 mental score	52±0.2	53.3±0.1	45.8±0.5