Table 2.

Measurement items included in the structural model.

Constructs	Measurement items
Behavior attitude (BA)	Relieving family conflict (Q10)
	Reducing fatigue (Q11)
	Regulating emotion (Q13)
Subjective norm (SN)	Advices of family members (Q15)
	Advices of friends (Q16)
	Advices of colleagues (Q17)
Perceived behavior control (PBC)	Negative impact on social communication (Q19)
	Reducing social communication during pregnancy (Q20)
	Substitutions in relaxations (Q24)
Perceived risk (PR)	Radiations risks to fetus (Q31)
	Fetal disease risks, such as fetal abnormalities and leucocythemia (Q32)
	Causing maternal disease risks, such as hypertension and diabetes (Q33)
Personal habit (PH)	Shopping with mobile phone (Q27)
	Watching videos and listening music (Q28)
	Social communications on social platforms (Q29)
	Conducting jobs with mobile phones (Q30)
Intention (I)	Future intention on mobile phone use during pregnancy(Q9)
Behavior (B)	Frequency of using mobile phone (Q8)