Table 2.

Associations of quartiles of fiber consumption by characteristics of study participants

Characteristic	Stratum	N	Fiber quartile_1 (N=404)	Fiber quartile_4 (N=405)	Odds ratio (95% CI)
Disease type	CD	577	327 (56.7)	250 (43.3)	ref
	UC/IC	232	77 (33.2)	155 (66.8)	2.63 (1.91–3.62)
Gender	female	587	351 (59.8)	236 (40.2)	ref
	male	222	53 (23.9)	169 (76.1)	4.74 (3.34–6.73)
Age category	<=30	167	77 (46.1)	90 (53.9)	ref
	31–40	178	90 (50.6)	88 (49.4)	0.84 (0.55–1.28)
	41–50	163	90 (55.2)	73 (44.8)	0.69 (0.45–1.07)
	51–60	182	88 (48.4)	94 (51.6)	0.91 (0.60–1.39)
	>60	119	59 (49.6)	60 (50.4)	0.87 (0.54–1.39)
Duration of disease	0–1 yr	68	43 (63.2)	25 (36.8)	ref
	2–5 yrs	174	79 (45.4)	95 (54.6)	2.07 (1.16–3.68)
	6–10 yrs	175	84 (48.0)	91 (52.0)	1.86 (1.05–3.31)
	11–20 yrs	192	83 (43.2)	109 (56.8)	2.26 (1.28–3.99)
	>20 yrs	198	113 (57.1)	85 (42.9)	1.29 (0.73–2.28)
History of surgery	no	539	250 (46.4)	289 (53.6)	ref
	yes	270	154 (57.0)	116 (43.0)	0.65 (0.49–0.87)
History of hospitalization	no	337	148 (43.9)	189 (56.1)	ref
	yes	472	256 (54.2)	216 (45.8)	0.66 (0.50–0.88)
Flare at follow-up	no	646	321 (49.7)	325 (50.3)	ref
	yes	163	83 (50.9)	80 (49.1)	0.95 (0.68–1.34)
Flare or hospitalization/surgery at follow-up	no	612	297 (48.5)	315 (51.5)	ref
	yes	197	107 (54.3)	90 (45.7)	0.79 (0.57–1.09)
Quartile of body weight	Q1: 85–130 lbs	213	125 (58.7)	88 (41.3)	ref
	Q2: 131–152 lbs	199	102 (51.3)	97 (48.7)	1.35 (0.92–1.99)
	Q3: 153–180 lbs	214	95 (44.4)	119 (55.6)	1.78 (1.21–2.61)
	Q4: 180.4–353 lbs	182	81 (44.5)	101 (55.5)	1.77 (1.19–2.64)
IBD medications at baseline	none	143	75 (52.4)	68 (47.6)	ref
	steroids	81	45 (55.6)	36 (44.4)	0.88 (0.51–1.53)
	immunosuppressants	240	117 (48.8)	123 (51.3)	1.16 (0.77–1.75)
	aminosalicylates	399	193 (48.4)	206 (51.6)	1.18 (0.80–1.73)
	biologics	254	138 (54.3)	116 (45.7)	0.93 (0.61–1.40)