First Report of FVC and FEV1 Reference Values for Beninese Children Aged 11–16 Years
Table 3
FVC and FEV1 values measured from our study compared to those calculated using the ITS-Black equations.
(A) Age Year (Sex)
(B) IC_height (cm)
(C) height (cm) standard
(D) IC_FVC (L) our study
(E) FVC (L) our standard
(F) FVC (L) equation ITS-Black
(G) Delta %
(H) IC_FEV1 (L) our standard
(I) FEV1 (L) our study
(J) FEV1(L) equation ITS Black
(K) Delta %
11 yrs (Boys)
[140.7; 145.5]
143.1
[1.91; 2.21]
2.06
+7.53
[1.46; 1.72]
1.59
2.03*
+27.62
12 yrs (Boys)
[147.0; 152.2]
149.6
[2.08; 2.36]
2.22
2.52*
+13.65
[1.62; 1.86]
1.73
2.31*
+33.53
13 yrs (Boys)
[152.6; 159.3]
155.9
[2.36; 2.78]
2.57
2.85*
+10.79
[1.84; 2.21]
2.03
2.61*
+28.37
14 yrs (Boys)
[156.5; 162.4]
159.4
[2.59; 2.97]
2.78
3.04*
+9.30
[2.06; 2.41]
2.23
2.78*
+24.68
15 yrs (Boys)
[159.4; 164.9]
162.1
[2.79; 3.19]
2.99
+6.75
[2.00; 2.31]
2.16
2.92*
+35.19
16 yrs (Boys)
[160.7; 168.0]
164.3
[2.95; 3.46]
3.21
+3.44
[1.99; 2.42]
2.20
3.04*
+38.06
11 yrs (Girls)
[143.1; 146.8]
144.9
[1.72; 1.98]
1.85
2.30*
+24.16
[1.35; 1.58]
1.47
2.01*
+36.48
12 yrs (Girls)
[149.1; 153.8]
151.4
[1.80; 2.08]
1.94
2.62*
+34.94
[1.34; 1.64]
1.49
2.28*
+52.86
13 yrs (Girls)
[148.8; 153.2]
151.0
[2.04; 2.34]
2.19
2.60*
+18.60
[1.58; 1.85]
1.72
2.26*
+31.41
14 yrs (Girls)
[139.3; 161.5]
150.4
[2.16; 2.42]
2.29
2.57*
+12.08
[1.77; 2.10]
1.93
2.23*
+15.77
15 yrs (Girls)
[153.3; 156.7]
154.9
[2.24; 2.54]
2.39
2.80*
+17.25
[1.75; 2.01]
1.88
2.43*
+29.42
16 yrs (Girls)
[153.8; 160.4]
157.0
[2.46; 2.96]
2.71
+7.64
[1.76; 2.35]
2.05
2.53*
+23.40
(A): different categories of age, year, and sex (B); confidence intervals (CI) of height; (C): reference values of height compatible with IC; (D): IC of FVC; (E): standard values of FVC according to IC; (F): FVC values obtained after introducing the referential height in ERS-93 equation; (G): ; (H): CI of FEV1; (I): standard values of FEV1 according to IC; (J): FEV1 values obtained after introducing of the referential height in ITS-Black equation; (K) ; *ITS-Black values significantly different (P < 0.05) from standard values in our study. No significant difference between the standard values of our study and the standards ITS-Black.
