Table 4 Association between patterns of biological rhythm and recency of self-harm behaviour

PC1 "Physical exercise"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

0.67 (0.49–0.92)

0.62 (0.48–0.81)

High (≥ 2nd tertile)

0.51 (0.36–0.72)

0.54 (0.41–0.72)

PC2 "Unhealthy eating practices"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

1.36 (0.96–1.93)

1.61 (1.21–2.15)

High (≥ 2nd tertile)

1.69 (1.19–2.39)

2.06 (1.53–2.75)

PC3 "Family meals for breakfast"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

0.76 (0.55–1.05)

0.76 (0.58–0.99)

High (≥ 2nd tertile)

0.57 (0.40–0.80)

0.48 (0.36–0.64)

PC4 "Nutritious diet"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

0.87 (0.63–1.20)

0.98 (0.75–1.27)

High (≥ 2nd tertile)

0.73 (0.52–1.02)

0.72 (0.55–0.95)

PC5 "Social interactions in school"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

0.91 (0.66–1.25)

1.13 (0.86–1.48)

High (≥ 2nd tertile)

0.87 (0.62–1.22)

1.04 (0.78–1.38)

PC6 "Daytime tiredness"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

0.89 (0.63–1.25)

0.72 (0.54–0.95)

High (≥ 2nd tertile)

1.19 (0.85–1.67)

1.10 (0.84–1.46)

PC7 "Unhealthy bedtime snacking"

Low (< 1st tertile)

Moderate (1st–2nd tertile)

1.30 (0.92–1.84)

1.40 (1.05–1.87)

High (≥ 2nd tertile)

1.54 (1.10–2.15)

2.21 (1.67–2.92)