Table 3 Association between 5 levels of medication adherence and self-inflicted violence behaviors during follow-up period (for hypothesis 2)

Suicide

Hazard ratio (95% CI)^a

Ref

0.489 (0.361, 0.664)^***

0.443 (0.322, 0.609)^***

0.563 (0.429, 0.740)^***

0.593 (0.490, 0.719)^***

Restricted mean survival time at 2534 days (95% CI)

 Difference—days

Ref

5.345 (3.415, 7.275)^***

5.908 (4.021, 7.796)^***

4.822 (2.868, 6.776)^***

4.066 (2.351, 5.780)^***

 Ratio

Ref

1.002 (1.001, 1.003)^***

1.002 (1.002, 1.003)^***

1.002 (1.001, 1.003)^***

1.002 (1.001, 1.002)^***

Suicide attempt

Hazard ratio (95% CI)^a

Ref

0.495 (0.377, 0.649)^***

0.589 (0.458, 0.757)^***

0.570 (0.448, 0.727)^***

1.614 (1.412, 1.845)^***

Restricted mean survival time at 2345 days (95% CI)

 Difference—days

Ref

6.806 (4.853, 8.758)^***

5.081 (2.926, 7.236)^***

5.479 (3.441, 7.517)^***

 − 9.169 (− 11.561, − 6.777)^***

    Ratio

Ref

1.003 (1.002, 1.004)^***

1.002 (1.001, 1.003)^***

1.002 (1.001, 1.003)^***

0.996 (0.995, 0.997)^***

NSSI

Hazard ratio (95% CI)^a

Ref

0.711 (0.566, 0.893)^**

0.576 (0.451, 0.737)^***

0.745 (0.604, 0.919)^**

1.873 (1.649, 2.126)^***

Restricted mean survival time at 2345 days (95% CI)

 Difference—days

Ref

3.742 (1.429, 6.055)^**

5.119 (2.898, 7.339)^***

3.051 (0.732, 5.370)^*

 − 13.834 (− 16.424, − 11.245)^***

 Ratio

Ref

1.002 (1.001, 1.003)^**

1.002 (1.001, 1.003)^***

1.001 (1.000, 1.002)^*

0.994 (0.993, 0.995)^***