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Table 2 Baseline characteristics according to low-carbohydrate-diet score in participants

From: Adherence to the low carbohydrate diet and the risk of breast Cancer in Iran

CharacteristicPremenopause (n = 567)Postmenopause (n = 292)
Q1Q2Q3Q4PtrendaQ1Q2Q3Q4Ptrenda
n = 172n = 134n = 174n = 87 n = 88n = 62n = 90n = 52 
MeanSDMeanSDMeanSDMeanSD MeanSDMeanSDMeanSDMeanSD 
Median score5.81.08.430.4910.50.4912.70.83< 0.0015.61.08.530.5010.50.5012.630.79< 0.001
Age, y40.97.839.98.139.68.740.27.60.556.18.053.810.253.38.556.88.30.06
BMI (kg/m2)27.75.127.95.328.16.727.64.40.8529.46.129.66.029.35.229.75.80.96
Physical activity (MET h/wk)24.831.319.825.625.030.625.435.90.423.222.124.734.123.647.421.829.10.97
Age at menarche, y13.12.213.02.313.12.113.21.70.8513.61.512.42.813.02.513.41.80.01
Educational level, n%
 None6.984.485.174.60.1926.117.722.221.10.48
 Primary26.720.120.126.4 32.919.324.423.1 
 Secondary school49.451.460.945.9 29.550.042.244.2 
 University16.823.813.722.9 11.312.911.111.5 
Married, %84.883.586.287.30.9181.880.678.880.70.92
Family history of breast cancer (yes), %5.237.463.455.750.477.9512.92.23.80.05
Oral contraceptive use (yes), %59.854.659.258.00.6754.761.652.350.90.64
Postmenopausal hormone use, %01.490.5700.293.44.82.200.43
Current smoking, %1.164.482.873.450.366.826.455.569.60.21
Alcohol intake, %1.745.975.784.600.2104.843.339.620.03
Fertility treatment, %4.654.485.178.050.655.686.458.891.920.42
Nulligravid, %15.1220.1516.6713.790.579.098.0610.005.770.84
Parity
 Nulliparous/missing44.140.338.542.50.8143.148.344.446.10.89
 18.1414.911.4913.7 5.684.83.31.9 
 2–337.736.540.233.3 20.427.423.323.1 
  ≥ 49.888.219.710.3 30.619.328.828.8 
  1. Values are mean (SD) or percentages
  2. aχ2 Test for ordinal qualitative variables and ANOVA for continuous variables