Table 4 Multiple linear regression models of quality of life among people with severe mental illness, Ethiopia, 2019 (n = 387)

Age of participants

0.34 (0.27, 0.42)***

0.37 (0.27, 0.47)***

0.53 (0.42, 0.64)***

0.44 (0.36, 0.52)***

Age of onset of illness

0.26 (0.20, 0.33)***

0.27 (0.19, 0.36)***

0.07 (− 0.02, 0.17)

 − 0.09 (− 0.07, 0.05)

Comorbid medical illness

No

Ref

Ref

###

###

Yes

− 4.12 (− 5.33, − 2.90)***

 − 1.87 (− 3.39, − 0.36)**

Stigma

No

Ref

Ref

Ref

Ref

Yes

 − 2.38 (− 3.38, − 1.37)**

 − 1.02 (− 2.33,0.29)

0.74 (− 0.82,2.31)

0.38 (− 0.67, 1.44)

Residency

Urban

###

###

Ref

Ref

Rural

0.93 (− 1.31, 3.11)

 − 0.98 (− 2.56, 0.59)

Living condition

With family

Ref

Ref

Ref

Ref

Living alone

 − 1.92 (− 3.09, − 0.74)*

0.41 (− 0.92, 1.76)

 − 1.27 (− 2.79, 0.24)

 − 0.52 (− 1.61,0.57)

Medication adherence

Adherent

Ref

Ref

Ref

Ref

Non-adherent

 − 0.42 (− 1.34, 0.49)

0.95 (− 0.24, 2.16)

 − 0.59 (− 1.92,0.74)

 − 0.17 (− 1.15,0.81)

Level of social support

Strong

Ref

Ref

Ref

Ref

Poor

 − 0.65 (− 1.71, 0.41)

− 4.87 (− 6.45, − 3.33)***

 − 3.79 (− 5.37, − 2.26)***

 − 3.49 (− 4.65, − 2.34)***

Moderate

0.55 (− 0.42, 1.52)

 − 1.29 (− 2.74, 0.14)

 − 0.30 (− 2.07, 1.47)

 − 0.25 (− 1.21,0.71)

Current sub/user

No

Ref

Ref

Ref

Ref

Yes

 − 1.19 (− 2.43, 0.05)

 − 0.11 (− 1.56, 1.34)

 − 1.29 (− 2.87,0.28)

0.79 (− 0.38, 1.96)

Follow up duration

Duration < 5 years

Ref

Ref

Ref

Ref

Duration 5–10 years

0.02 (− 1.06, 1.07)

0.01 (− 1.32, 1.34)

 − 3.09 (− 4.61, − 1.58)*

 − 2.29 (− 3.42, − 1.13)***

Duration > 10 years

 − 1.67 (− 2.89, − 0.41)***

 − 0.73 (− 2.28,0.81)

 − 0.46 (− 2.24,1.29)

 − 0.58 (− 1.83, 0.67)

Occupation

Employed

Ref

Jobless

###

###

###

 − 0.68 (− 2.04,0.66)

Private business

0.09 (− 1.31,1.47)

Student

1.22 (− 0.56, 3.02)