Table 8.

Repeated measures general linear model (GLM) for the effect of group, NRS48 cough, duration of surgery, and age at each time point on DN4 scores at 3, 6, and 12 months

	Df	SS	MS	F	P
DN4 at 3 months
Intercept	1	1.73	1.73	0.55	0.46
Group	2	12.58	6.29	1.99	0.14
NRS48 cough	1	24.31	24.31	7.69	0.01
Duration	1	0.01	0.01	0.00	0.95
Age	1	0.24	0.24	0.08	0.78
Error	68	214.95	3.16
Total	73	250.59
DN4 at 6 months
Intercept	1	0.72	0.72	0.36	0.55
Group	2	11.88	5.94	2.97	0.06
NRS48 cough	1	22.13	22.13	11.06	< 0.01
Duration	1	0.55	0.55	0.27	0.60
Age	1	0.52	0.52	0.26	0.61
Error	68	136.01	2.00
Total	73	172.05
DN4 at 12 months
Intercept	1	0.41	0.41	0.25	0.62
Group	2	11.77	6.09	3.99	0.07
NRS48 cough	1	18.73	18.73	11.69	< 0.01
Duration	1	0.56	0.56	0.35	0.56
Age	1	0.00	0.00	0.00	0.97
Error	68	108.95	1.60
Total	73	141.09

df degrees of freedom, SS sum of squares, MS mean squares, F F test