Table 6 Weighted association of secondhand smoke exposure in different settings and depressive symptom in NHANES 2013–18 adults aged 18–35 years.

In restaurant

 Model V^c

1.800 (1.223–2.561)

 Model VI^d

1.913 (1.275–2.872)

 Model VII^e

1.943 (1.288–2.932)

 Model VIII^f

1.912 (1.267–2.884)

 Model IX^h

1.732 (1.120–2.678)

In bar

 Model V^c

1.447 (1.083–1.934)

 Model VI^d

1.403 (1.036–1.899)

 Model VII^e

1.243 (0.914–1.692)

 Model VIII^f

1.223 (0.906–1.678)

 Model IX^h

0.998 (0.711–1.373)

In car

 Model V^c

2.001 (1.704–2.349)

 Model VI^d

1.843 (1.557–2.182)

 Model VII^e

1.505 (1.252–1.809)

Model VIII^f

1.468 (1.214–1.774)

 Model IX^h

1.350 (1.102–1.652)

In another home

 Model V^c

1.780 (1.462–2.168)

 Model VI^d

1.625 (1.322–1.998)

 Model VII^e

1.378 (1.114–1.705)

 Model VIII^f

1.359 (1.098–1.682)

 Model IX^h

1.161 (0.923–1.461)

In other indoors

 Model V^c

1.629 (1.266–2.097)

 Model VI^d

1.619 (1.243–2.110)

 Model VII^e

1.470 (1.125–1.922)

 Model VIII^f

1.442 (1.103–1.887)

 Model IX^h

1.230 (0.929–1.629)