Development of an attention-touch control for manual cervical distraction: a pilot randomized clinical trial for patients with neck pain

Table 4 Cervical traction forces measured in Newtons (N) over four treatment visits

Force range	Contact level	Number of observations^a	Mean	SD	Minimum	Maximum
Light Force (0-20 N)	C5	64	13.82	5.74	0.18	23.31
Light Force (0-20 N)	Occiput	64	17.19	4.84	0.47	26.64
Medium Force (21-50 N)	C5	57	38.30	12.12	8.61	59.07
Medium Force (21-50 N)	Occiput	56	42.87	10.40	7.70	69.57
High Force (51-100 N)	C5	60	65.08	17.70	30.63	89.65
High Force (51-100 N)	Occiput	60	74.06	16.08	37.54	98.34

^aWe recorded 23 missing values for traction forces due to 9 missed appointments (18 observations) and 5 instances of technical problems in data collection

ISSN: 1745-6215