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Table 5 Odds ratio (95 % CI) associated with the interaction of HL and psychological symptoms on NSSI among junior and high school students

From: Low health literacy and psychological symptoms potentially increase the risks of non-suicidal self-injury in Chinese middle school students

Psychological symptoms

HL

NSSI

P *

n (%)

Crude OR (95 % CI)

Adjusted OR a (95 % CI)

No

High

861 (15.2)

Ref.

Ref.

<0.001

Medium

2289 (22.7)

1.638 (1.503–1.756) ***

1.676 (1.536–1.828) ***

Low

1002 (24.7)

1.837 (1.659–2.033) ***

1.877 (1.692–2.082) ***

Yes

High

207 (42.3)

4.100 (3.379–4.975) ***

4.264 (3.511–5.180) ***

Medium

1340 (51.9)

5.804 (5.216–6.459) ***

6.242 (5.588–6.972) ***

Low

1272 (51.0)

6.036 (5.429–6.710) ***

6.446 (5.788–7.719) ***

  1. HL is health literacy; NSSI is non-suicidal self-injury
  2. * P-value of interaction between HL and psychological symptoms on NSSI in multiplicative model
  3. *** P < 0.001 compared with referent
  4. a Adjusted for gender, grade, registered residence, household structure, parents’ educational level, and perceived family economy