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Table 3 Associations between breast cancer and the timing of eating and duration of nighttime eating behavior in Hong Kong Chinese women

From: Nighttime eating and breast cancer among Chinese women in Hong Kong

Variables Case participants
(n = 894)
Controls
(n = 882)
ORa
(95% CI)
ORb
(95% CI)
ORc
(95% CI)
P valued
Duration
 None 762 (85.2) 774 (87.8) 1.00 (ref) 1.00 (ref) 1.00 (ref)  
 <10 48 (5.4) 45 (5.1) 1.34 (0.87–2.06) 1.76 (0.99–3.13) 1.75 (0.97–3.14) 0.06
 10–19 40 (4.5) 42 (4.8) 1.05 (0.67–1.64) 1.46 (0.81–2.63) 1.46 (0.80–2.65) 0.22
 ≥20 44 (4.9) 21 (2.4) 2.23 (1.30–3.82) 2.08 (1.05–4.15) 2.28 (1.13–4.61) 0.02
Timing
 None 762 (85.2) 774 (87.8) 1.00 (ref) 1.00 (ref) 1.00 (ref)  
 10 p.m.–12 a.m. 78 (8.7) 58 (6.6) 1.54 (1.08–2.21) 1.80 (1.11–2.90) 1.84 (1.14–2.98) 0.01
 12 a.m.–2 a.m. 20 (2.2) 15 (1.7) 1.43 (0.72–2.82) 2.50 (1.00–6.26) 2.73 (1.01–6.99) 0.04
 2 a.m.–4 a.m. 12 (1.3) 12 (1.4) 1.08 (0.48–2.43) 1.98 (0.79–4.97) 1.93 (0.76–4.94) 0.17
 Irregulare 22 (2.5) 23 (2.6) 1.14 (0.62–2.08) 0.99 (0.42–2.37) 0.99 (0.41–2.40) 0.98
  1. aAdjusted for age at interview. bAdjusted for age at interview, age at menarche, age at first birth, body mass index (BMI), history of cancer in a first-degree family member and shift work. cAdjusted for age at interview, age at menarche, age at first birth, BMI, history of cancer in a first-degree family member, shift work and other dietary factors (consumption of cereals, deep-fried foods, preserved meats and dairy products). d P value for model 3. eNo fixed time for nighttime eating. P values in italics are statistically significant. ref reference