Table 4.

Relative risk ratios showing associations between age at menarche and suicidal and non-suicidal self-harm, v. no self-harm, and suicidal v. non-suicidal self-harm, at age 16

	Non-suicidal self-harm v. no self-harm				Suicidal self-harm v. no self-harm				Suicidal v. non-suicidal self-harm
	Unadjusted		Adjusted		Unadjusted		Adjusted		Unadjusted		Adjusted
	RRR (95% CI)	p	RRR (95% CI)	p	RRR (95% CI)	p	RRR (95% CI)	p	RRR (95% CI)	p	RRR (95% CI)	p
Per 1-year increase in aPHV	0.85 (0.77–0.92)	<0.001	0.86 (0.78–0.94)	0.013	0.86 (0.76–0.97)	0.002	0.90 (0.79–1.02)	0.087	1.02 (0.89–1.16)	0.823	1.04 (0.91–1.20)	0.540
Timing of aPHV
Early (<11.0 years)	1.31 (1.02–1.71)	0.037	1.26 (0.97–1.64)	0.089	1.55 (1.09–2.20)	0.014	1.42 (0.99–2.02)	0.056	1.18 (0.79–1.76)	0.419	1.13 (0.75–1.69)	0.570
Normative (11.0–12.6 years)	1.00	–	1.00	–	1.00	–	1.00	–	1.00	–	1.00	–
Late (>12.6 years)	0.69 (0.52–0.90)	0.007	0.69 (0.52–0.92)	0.011	0.79 (0.53–1.18)	0.248	0.84 (0.56–1.25)	.379	1.15 (0.73–1.83)	0.541	1.20 (0.75–1.93)	0.441

Analyses completed on imputed datasets (n = 4042).

Adjusted models include measures of maternal education, material hardship, maternal depression, childhood sexual abuse, parental separation, and body mass index (BMI).