Inspiratory response and side-effects to rapid bilateral magnetic phrenic nerve stimulation using differently shaped coils: implications for stimulation-assisted mechanical ventilation

Table 2 Group and individual correlations for respiratory belts with inspiratory responses, and change in galvanic skin response with sensory responses during single-train rapid bilateral anterior magnetic phrenic nerve stimulation

Correlated variables	Group repeated measures correlation		Individual correlations
Correlated variables	r	P-value	Number of individuals with a significant correlation	Range of r (significant correlations only)
ΔAbdominal circumference
Δ_Abdominal and V_T	0.64	< 0.0001	11 of 12	0.53 – 0.91
Δ_Abdominal and P_di,mean	0.52	< 0.0001	6 of 6	0.55 – 0.97
ΔChest circumference
Δ_Chest and V_T	0.46	< 0.0001	9 of 12	0.39 – 0.84
Δ_Chest and P_di,mean	0.11	0.1429	2 of 6	-0.63 – 0.63
Galvanic skin response
ΔGSR and Pain	0.55	< 0.0001	8 of 10	0.56 – 0.75
ΔGSR and Discomfort	0.63	< 0.0001	9 of 10	0.52 – 0.87
ΔGSR and Paresthesia	0.38	< 0.0001	5 of 10	0.39 – 0.78

r: repeated measures correlation coefficient; Δ_Abdominal: change in abdominal circumference; V_T: tidal volume; P_di,mean: mean transdiaphragmatic pressure; Δ_Chest: change in chest circumference; ΔGSR: change in galvanic skin response. Individual Pearson correlations were performed between respiratory belts and inspiratory variables, and individual Spearman correlations were performed between ΔGSR and sensory responses

ISSN: 1465-993X