Table 2.

Pulmonary function outcomes in patients with chronic SCI in seated and supine positions

Subjects	FVC (% predicted)	FEV1 (% predicted)	PEmax (cm H2O)	PImax (cm H2O)
All subjects (n=27)
Seated	76.5 ± 19.6	66.6 ± 20.4	60.5 ± 26.6	−74.3 ± 26.0
Supine	78.6 ± 16.9	65.5 ± 18.0	53.4 ± 25.5*	−69.3 ± 24.1
Power (β)	0.390	0.117	0.756	0.296
p-value	0.085	0.433	0.011	0.083
Motor-complete (n = 13)
Seated	64.7 ± 13.8	56.5 ± 13.8	49.1 ± 22.7	−72.0 ± 29.6
Supine	70.4 ± 11.4*	59.2 ± 11.3	39.9 ± 14.4*	−69.1 ± 26.9
Power (β)	0.840	0.200	0.600	0.086
p-value	0.007	0.248	0.031	0.550
Motor-incomplete (n = 14)
Seated	87.4 ± 18.0	76.1 ± 21.5	71.1 ± 26.2	−76.5 ± 23.1
Supine	86.2 ± 18.0	71.4 ± 21.4*	66.0 ± 27.4	−69.6 ± 22.1*
Power (β)	0.168	0.958	0.269	0.549
p-value	0.298	0.002	0.177	0.042
Cervical Motor-complete (n = 7)
Seated	59.3 ± 8.1	49.4 ± 8.5	35.5 ± 18.7	−53.9 ± 24.6
Supine	65.9 ± 7.3*	54.8 ± 10.2	29.3 ± 7.4	−62.1 ± 32.4
Power (β)	0.629	0.403	0.174	0.390
p-value	0.033	0.086	0.274	0.097
Cervical Motor-incomplete (n = 8)
Seated	82.6 ± 18.1	68.7 ± 21.2	64.0 ± 28.6	−65.7 ± 20.3
Supine	83.0 ± 18.3	64.5 ± 19.2*	56.7 ± 22.2*	−60.5 ± 12.9
Power (β)	0.060	0.639	0.580	0.204
p-value	0.834	0.030	0.040	0.230
Thoracic Motor-complete (n = 6)
Seated	71.0 ± 17.0	64.8 ± 14.7	65.1 ± 16.0	−93.1 ± 19.6
Supine	75.6 ± 13.8	64.3 ± 11.0	52.2 ± 9.6	−77.2 ± 18.0*
Power (β)	0.275	0.050	0.440	0.599
p-value	0.154	0.892	0.076	0.041
Thoracic Motor-incomplete (n = 6)
Seated	93.7 ± 17.4	85.8 ± 19.2	80.4 ± 21.4	−90.9 ± 19.5
Supine	90.6 ± 18.2*	80.6 ± 22.2*	78.4 ± 30.8	−81.8 ± 27.0
Power (β)	0.720	0.562	0.056	0.309
p-value	0.022	0.042	0.798	0.132

Values are means ± SD;

^*Significant difference compared with seated, p < 0.05 (paired t-test).