Table 4 ORs and 95% Cls for quartiles of dietary nutrients intake with cervical intraepithelial neoplasia grade1 risk among 2304 women in the study^a

Folate

 Median intake (μg/day)

297

381

488

764

 No. of cases

132

147

139

146

 Model 1

0.91 (0.69–1.20)

1.01 (0.77–1.32)

0.91 (0.69–1.19)

1.00 (reference)

< 0.001

 Model 2

0.95 (0.72–1.26)

1.04 (0.79–1.37)

0.92 (0.70–1.21)

1.00 (reference)

0.012

 Model 3

0.96 (0.72–1.27)

1.04 (0.79–1.37)

0.91 (0.69–1.21)

1.00 (reference)

0.020

Vitamin B1

 Median intake (mg/day)

1.1

1.4

1.9

2.7

 No. of cases

134

157

132

141

 Model 1

0.91 (0.68–1.22)

1.25 (0.95–1.65)

0.89 (0.68–1.15)

1.00 (reference)

< 0.001

 Model 2

0.98 (0.73–1.31)

1.31 (0.99–1.74)

0.89 (0.68–1.17)

1.00 (reference)

0.011

 Model 3

0.99 (0.74–1.34)

1.33 (1.00–1.77)

0.91 (0.69–1.19)

1.00 (reference)

0.017

Vitamin B2

 Median intake (mg/day)

1.1

1.4

1.8

2.7

 No. of cases

123

148

157

136

 Model 1

0.85 (0.64–1.12)

1.13 (0.85–1.48)

1.08 (0.82–1.42)

1.00 (reference)

< 0.001

 Model 2

0.88 (0.66–1.17)

1.16 (0.88–1.54)

1.09 (0.83–1.44)

1.00 (reference)

0.011

 Model 3

0.87 (0.66–1.17)

1.15 (0.86–1.52)

1.10 (0.83–1.45)

1.00 (reference)

0.020

Vitamin B6

 Median intake (mg/day)

1.7

2.1

2.6

3.9

 No. of cases

144

146

131

143

 Model 1

1.04 (0.79–1.36)

0.99 (0.76–1.30)

0.90 (0.69–1.19)

1.00 (reference)

< 0.001

 Model 2

1.08 (0.82–1.43)

1.00 (0.76–1.32)

0.90 (0.68–1.19)

1.00 (reference)

< 0.001

 Model 3

1.09 (0.83–1.44)

0.99 (0.75–1.31)

0.91 (0.69–1.21)

1.00 (reference)

0.019

Vitamin C

 Median intake (mg/day)

46.0

62.8

86.9

138.9

 No. of cases

124

149

145

146

 Model 1

0.85 (0.65–1.13)

1.05 (0.81–1.38)

1.01 (0.77–1.33)

1.00 (reference)

< 0.001

 Model 2

0.87 (0.65–1.16)

1.09 (0.83–1.44)

1.04 (0.79–1.36)

1.00 (reference)

0.012

 Model 3

0.86 (0.65–1.15)

1.09 (0.83–1.44)

1.04 (0.79–1.37)

1.00 (reference)

0.021

Vitamin E

 Median intake (mg/day)

4.4

8.8

10.8

21.7

 No. of cases

131

135

151

147

 Model 1

0.83 (0.63–1.09)

0.86 (0.65–1.13)

1.08 (0.83–1.42)

1.00 (reference)

< 0.001

 Model 2

0.84 (0.63–1.11)

0.88 (0.67–1.16)

1.09 (0.83–1.44)

1.00 (reference)

0.013

 Model 3

0.85 (0.64–1.12)

0.87 (0.66–1.16)

1.10 (0.83–1.45)

1.00 (reference)

0.023

Vitamin K

 Median intake (μg/day)

133.0

194.0

285.0

534.0

 No. of cases

125

159

139

141

 Model 1

0.94 (0.71–1.23)

1.23 (0.93–1.62)

1.00 (0.77–1.31)

1.00 (reference)

< 0.001

 Model 2

0.96 (0.73–1.27)

1.24 (0.94–1.64)

1.01 (0.77–1.33)

1.00 (reference)

0.010

 Model 3

0.98 (0.74–1.29)

1.24 (0.94–1.65)

1.03 (0.79–1.36)

1.00 (reference)

0.017

Niacin

 Median intake (mg/day)

17.7

21.6

27.9

42.8

 No. of cases

147

140

135

142

 Model 1

1.11 (0.84–1.46)

0.96 (0.73–1.27)

0.96 (0.73–1.26)

1.00 (reference)

< 0.001

 Model 2

1.14 (0.86–1.51)

0.97 (0.74–1.28)

0.93 (0.71–1.23)

1.00 (reference)

0.012

 Model 3

1.15 (0.87–1.53)

0.96 (0.73–1.26)

0.94 (0.72–1.25)

1.00 (reference)

0.020

Dietary fiber

 Median intake (g/day)

27.4

34.5

43.7

63.2

 No. of cases

138

148

136

142

 Model 1

0.99 (0.75–1.30)

1.07 (0.82–1.41)

0.92 (0.70–1.21)

1.00 (reference)

< 0.001

 Model 2

1.05 (0.79–1.39)

1.12 (0.85–1.47)

0.93 (0.71–1.23)

1.00 (reference)

0.010

 Model 3

1.05 (0.79–1.39)

1.12 (0.85–1.48)

0.95 (0.72–1.25)

1.00 (reference)

0.018