Table 3 Odds ratios (95% confidence intervals) for early menarche based on 1-standard deviation for dietary intakes of protein-containing food groups

Total protein

0.80 (0.58–1.10)

0.63 (0.26–1.51)

0.56 (0.22–1.39)

 p-value

0.167

0.298

0.208

Animal protein

0.98 (0.70–1.39)

1.25 (0.65–2.42)

1.20 (0.62–2.33)

 p-value

0.928

0.505

0.583

Plant protein

0.59 (0.40–0.88)

0.40 (0.16–0.98)

0.39 (0.16–0.96)

 p-value

0.010

0.046

0.040

Fat food

0.79 (0.54–1.14)

0.74 (0.46–1.18)

0.77 (0.48–1.24)

 p-value

0.204

0.207

0.279

Red meat

1.34 (0.85–2.11)

1.84 (0.93–3.62)

1.90 (0.96–3.76)

 p-value

0.205

0.078

0.067

Poultry

1.90 (1.01–3.55)

1.46 (0.67–3.20)

1.42 (0.65–3.11)

 p-value

0.046

0.344

0.378

Fish

0.79 (0.51–1.23)

0.86 (0.45–1.64)

0.83 (0.42–1.62)

 p-value

0.291

0.640

0.583

Organ meat

0.74 (0.39–1.42)

0.63 (0.27–1.47)

0.66 (0.28–1.57)

 p-value

0.368

0.284

0.348

Egg

0.89 (0.62–1.28)

0.85 (0.53–1.36)

0.85 (0.53–1.38)

 p-value

0.531

0.490

0.515

Legumes

1.06 (0.75–1.50)

1.19 (0.74–1.91)

1.18 (0.73–1.91)

 p-value

0.737

0.465

0.489

Low-fat dairy

0.98 (0.72–1.33)

1.05 (0.69–1.59)

1.02 (0.67–1.55)

 p-value

0.879

0.820

0.928

High-fat dairy

0.91 (0.66–1.26)

1.14 (0.72–1.80)

1.07 (0.66–1.72)

 p-value

0.568

0.567

0.793

Total dairy

0.92 (0.67–1.25)

1.14 (0.71–1.81)

1.06 (0.65–1.73)

 p-value

0.596

0.596

0.828