Lung vital capacity and oxygen saturation in adults with cerebral palsy

Figures & data

Figure 1 Chest expansion.

Note: Measured values (blue rhombs) with matched norm values (red squares) given by Moll and Wright. Adapted by permission from BMJ Publishing Group Limited. An objective clinical study of chest expansion, Moll JM, Wright V, 31(1), 1–8, Copyright © 1972.⁸

Figure 2 Vital capacity.

Notes: Measured values (blue rhombs) with matched normal values (red squares). Matched normal values calculated using formulas from Rollings.¹⁰

Table 1 Measurement results

N	VC (L)	Normal VC (L)	Inspiration (cm)	Expiration (cm)	CE (cm)	OS (%)
1	1.20	Absent	Sick	Sick	Sick	99
2	1.86	2.69	88.50	85.50	2.50	97
3	2.03	2.84	Absent	Absent	Absent	97
4	1.00	3.12	Absent	Absent	Absent	97
5	2.00	4.01	87.50	85.50	2.00	98
6	2.65	3.85	119.50	117.50	2.00	96
7	2.75	3.32	112.00	110.00	2.00	95
8	3.00	4.35	96.00	86.50	9.50	99
9	1.80	4.04	Absent	Absent	Absent	99
10	Absent	3.88	84.00	82.00	2.00	Absent
11	3.52	4.23	94.00	86.00	8.00	98
12	4.00	4.13	Absent	Absent	Absent	97
13	1.99	3.99	97.50	94.00	3.50	98
14	1.80	3.88	91.50	90.00	1.50	98
15	5.00	4.89	119.00	116.00	3.00	96
16	2.66	4.04	Absent	Absent	Absent	97
17	1.28	3.63	Sick	Sick	Sick	95
18	5.52	4.7	137.00	133.50	3.50	97
19	1.00	3.92	Absent	Absent	Absent	97
20	3.11	4.01	121.50	119.50	2.00	96
21	1.00	3	104.00	103.00	1.00	97
22	3.11	4.22	108.50	106.00	2.50	97
23	1.69	3.46	96.00	94.50	1.50	95
24	1.00	3.55	91.00	89.00	2.00	98
25	0.68	3.91	103.50	102.00	1.50	97
26	2.09	3.79	88.00	83.00	5.00	94
27	0.78	3.36	90.00	90.00	0.00	93
28	1.80	3.91	118.00	117.00	1.00	98
29	2.20	3.97	98.00	96.00	2.00	99
30	4.00	3.8	111.50	110.50	1.00	99
31	2.50	3.56	98.00	97.00	1.00	95
32	0.87	3.38	112.00	109.00	3.00	90
33	1.00	3.5	103.00	100.00	3.00	98
34	Absent	3.58	Absent	Absent	Absent	94
35	Absent	3.91	102.00	100.50	1.50	98
36	2.40	3.56	106.00	100.50	5.50	99
37	Absent	3.11	94.50	94.00	0.50	99
38	1.26	3.36	94.00	94.00	0.00	98
39	Absent	3.83	Absent	Absent	Absent	99
40	Absent	3.73	96.00	94.00	2.00	99
41	2.30	4.27	102.00	101.00	1.00	96
42	Absent	3.89	103.50	103.00	0.50	Absent
43	2.00	4.3	102.00	98.00	4.00	97
44	1.80	3.92	87.00	85.00	2.00	97
45	2.21	3.54	87.00	85.00	2.00	97
46	2.90	4	103.00	99.50	3.50	97

Abbreviations: N, number; VC, vital capacity; CE, chest expansion; OS, oxygen saturation.

Figure 3 Decreasing mean chest expansion (cm) with the increase of GMFCS level.

Note: Error bars show the standard deviations from the mean values.
Abbreviation: GMFCS, Gross Motor Function Classification System.

Figure 4 Decreasing mean vital capacity (L) with the increase of GMFCS level.

Note: Error bars show the standard deviations from the mean values.
Abbreviation: GMFCS, Gross Motor Function Classification System.

Table 2 Results of the statistical analysis

	n	Degrees of polynomial approximation
		1	2	3	4	5	6
VC versus CE	R	0.112	0.136	0.143	0.147	0.152	0.198
	r	0.335	0.369	0.379	0.384	0.391	0.445
	P	0.066	0.04	0.035	0.033	0.03	0.012
CE versus OS	R	0.019	0.046	0.059	0.089	0.110	0.110
	R	0.140	0.214	0.243	0.299	0.333	0.330
	P	0.434	0.230	0.172	0.090	0.058	0.058
DCE versus OS	R	0.0076	0.053	0.055	0.056	0.060	0.104
	R	0.087	0.231	0.236	0.237	0.245	0.323
	P	0.622	0.187	0.178	0.176	0.161	0.060
VC versus OS	R	0.023	0.056	0.070	0.110	0.151	0.168
	r	0.152	0.242	0.265	0.332	0.389	0.410
	P	0.355	0.137	0.102	0.004	0.014	0.010
DVC versus OS	R	0.017	0.023	0.024	0.037	0.104	0.105
	r	0.129	0.153	0.155	0.192	0.322	0.323
	P	0.430	0.352	0.345	0.241	0.050	0.040

Notes: n, degree of polynomial approximation; R, R² values; r, Pearson’s correlation coefficients; P, P-values.

Abbreviations: VC, vital capacity; CE, chest expansion; OS, oxygen saturation; DCE, deviation of the measured chest expansion from the normal values; DVC, deviation of the measured vital capacity from the normal values.

MollJMWrightVAn objective clinical study of chest expansionAnn Rheum Dis1972311185008463

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RollingsRCFacts and Formulas4th edSaline, MIMcNaughton & Gunn1985

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