Table 4 Odds ratio (95% CIs) of cervical cancer for quartiles of dietary antioxidant vitamin intakes in Chinese women.

From: Associations between antioxidant vitamins and the risk of invasive cervical cancer in Chinese women: A case-control study

 

Quartiles of dietary energy-adjusted antioxidant vitamin intakes

P-trend

Q1

Q2

Q3

Q4

Dietary retinol equivalents

 N (case/control)

120/185

112/186

108/186

118/185

 

 Median (case/control), μg/da

169/168

284/280

569/569

639/642

 

 Crude ORs (95% CI)

1.00

0.93 (0.67, 1.29)

0.90 (0.64, 1.25)

0.98 (0.71, 1.36)

0.870

 Adjusted ORs (95% CI)

1.00

0.96 (0.69, 1.35)

0.96 (0.69, 1.35)

1.10 (0.79, 1.54)

0.597

Dietary vitamin A

 N (case/control)

118/185

112/186

118/186

110/185

 

 Median (case/control), μg/da

79/80

176/170

325/329

450/451

 

 Crude ORs (95% CI)

1.00

0.94 (0.68, 1.31)

1.00 (0.72, 1.38)

0.93 (0.67, 1.30)

0.767

 Adjusted ORs (95% CI)

1.00

0.98 (0.70, 1.37)

1.09 (0.78, 1.53)

1.06 (0.75, 1.50)

0.606

Dietary β-carotene

 N (case/control)

128/185

134/186

104/186

92/185

 

 Median (case/control), μg/da

895/899

1921/1943

3215/3224

4196/4208

 

 Crude ORs (95% CI)

1.00

1.12 (0.82, 1.54)

0.82 (0.59, 1.14)

0.76 (0.55, 1.07)

0.040

 Adjusted ORs (95% CI)

1.00

1.12 (0.81, 1.53)

0.84 (0.61, 1.17)

0.79 (0.57, 1.11)

0.080

Dietary vitamin E

 N (case/control)

158/185

108/186

120/186

72/185

 

 Median (case/control), mg/da

3.6/3.8

6.5/6.6

15.4/16.2

22.8/23.1

 

 Crude ORs (95% CI)

1.00

0.68 (0.50, 0.94)

0.76 (0.55, 1.03)

0.53 (0.36, 0.79)

0.004

 Adjusted ORs (95% CI)

1.00

0.69 (0.50, 0.95)

0.78 (0.57, 1.08)

0.55 (0.37, 0.84)

0.012

Dietary vitamin C

 N (case/control)

132/185

121/187

121/185

84/185

 

 Median (case/control), mg/da

25/29

63/68

129/136

255/263

 

 Crude ORs (95% CI)

1.00

0.91 (0.66, 1.25)

0.92 (0.67, 1.26)

0.64 (0.45, 0.90)

0.018

 Adjusted ORs (95% CI)

1.00

0.91 (0.66, 1.25)

0.91 (0.66, 1.25)

0.63 (0.45, 0.89)

0.016

  1. Crude and adjusted ORs (95% CI): from unconditional logistic regression models; Covariates adjusted: see Table 3.
  2. aMedian percentage of total energy in cases and controls.
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