Table 4.

Severity of symptoms in subgroups of IBS associated to age, gender and food groups

Age, gender and food groups	C-IBSAn =103		A-IBSBn = 174		D-IBSCn = 111
	OR (95% CI )	p	OR (95% CI )	p	OR (95% CI )	p
Age, years	1.01 (0.97 to 1.04)	0.80	0.97 (0.93 to 1.00)	0.074	0.96 (0.91 to 1.02)	0.18
Female	0.93 (0.33 to 2.68)	0.90	0.16 (0.07 to 0.37)	< 0.001	0.73 (0.29 to 1.84)	0.51
Fruits and berries, 100 g/day			0.75 (0.43 to 1.31)	0.31	1.93 (1.20 to 3.09)	0.006
Vegetables, 100 g/day	1.97 (1.31 to 2.98)	0.001	1.51 (1.08 to 2.13)	0.016
Potatoes, 100 g/day	0.53 (0.30 to 0.95)	0.034
Dairy products, portions1/day			0.90 (0.73 to 1.11)	0.33
Water, 100 ml/day			1.06 (0.91 to 1.24)	0.45
Juice, 100 ml/day			0.87 (0.66 to 1.15)	0.33
Carbonated beverages, 100 ml/day	1.16 (0.90 to 1.48)	0.25	0.92 (0.80 to 1.07)	0.28	1.37 (1.12 to 1.67)	0.002
Tea, 100 ml/day			1.07 (0.94 to 1.21)	0.30
Alcohol, units2/day					3.19 (1.62 to 6.28)	0.001

¹ Dairy product portions are defined as either 150 ml milk/yoghurt or 20 g (one slice) of cheese.

² Units of alcohol are defined as 12.8 g (15 ml) of pure alcohol.

^A Adjusted for age, gender, HSCL10, musculoskeletal complaints, BMI, pulse, triglycerides, vegetables, potatoes, and carbonated beverages. Age, gender, and food groups included in the analyses are shown.

^B Adjusted for age, gender, HSCL10, musculoskeletal complaints, number of diseases, diastolic blood pressure, systolic blood pressure, triglycerides, creatinine clearance, education, physical activity, fruits and berries, vegetables, milk products, water, juice, tea, and carbonated beverages,. Age, gender, and food groups included in the analyses are shown.

^C Adjusted for age, gender, HSCL10, musculoskeletal complaints, number of diseases, BMI, diastolic blood pressure, creatinine clearance, fruits and berries, carbonated beverages, and alcohol. Age, gender, and food groups included in the analyses are shown.