Table 4. Habitual posture and craniocervical mobility of the normal and addiction groups according to subdiagnosis of TMDs.

	Normal group			Addiction group
	Joint	Muscular	Mixed	Joint	Muscular	Mixed
Cervical flexion posture while using a smartphone (°)	12.82±10.96	14.81±6.91	4.00±5.44	29.92±13.55**	30.63±12.31**	20.83±8.23**
Lateral flexion (Rt.) (°)	4.75±1.3	4.67±1.23	4.40±1.49	5.14±1.25	4.81±0.96	4.69±1.16
Lateral flexion (Lt.) (°)	68.06±7.54	67.78±6.03	71.33±6.86	60.45±6.14**	57.22±6.35**	66.11±7.06
Rotation (Rt.) (°)	69.21±8.22	68.70±4.70	74.33±11.67	63.41±7.15*	58.41±6.89**	63.89±3.87
Rotation (Lt.) (°)	62.41±8.26	56.67±9.88	53.00±4.00	54.55±11.07**	47.62±8.98*	53.33±12.62
Cervical flexion (°)	74.53±8.92	72.59±6.24	75.00±6.15	71.59±9.76	64.92±7.91*	72.78±3.38
Cervical extension (°)	41.57±5.18	37.22±4.08	39.33±3.59	35.15±9.87**	30.48±4.02**	39.44±11.08
Cervical protrusion (cm)	43.52±6.11	40.19±5.58	42.33±3.43	37.65±8.36**	33.73±4.85**	40.00±9.28

Values are mean ± SD. *significant difference, p < 0.05. **significant difference, p < 0.01