Table 4.

Participants' respiratory muscle function per age group

	Age category, years
	8 and 9	10 and 11	12 and 13	14 and 15	16–18
Boys	n = 19	n = 22	n = 27	n = 22	n = 27
P0.1, cm H2O	0.30±0.15 b	0.22±0.13	0.22±0.08 c	0.28±0.19 d	0.16±0.06 e
TI/TTOT	0.46±0.04 b	0.47±0.05	0.46±0.05 c	0.44±0.07 d	0.46±0.04 e
PImax, cm H2O	89±13	97±20	118±27	125±26	126±24
PEmax, cm H2O	117±25	117±31	132±26	151±32	161±43
P0.1/PImax, %	0.32±0.16 b	0.24±0.12	0.19±0.07 c	0.22±0.14 d	0.13±0.05 e
TT0.1a	0.015±0.008 b	0.012±0.007	0.009±0.003 c	0.010±0.006 d	0.006±0.002 e
Girls	n = 23	n = 21	n = 37	n = 24	n = 29
P 0.1, cm H 2O	0.28±0.10 f	0.23±0.10	0.28±0.13 g	0.21±0.11 i	0.15±0.05j
TI/TTOT	0.46±0.05 f	0.45±0.05	0.47±0.04 g	0.46±0.06 i	0.45±0.04 j
PImax, cm H2O	93±24	91±22	96±25	112±23	110±32
PEmax, cm H2O	105±20	106±26	116±28	134±33	127±33
P0.1/PImax, %	0.31±0.13 f	0.27±0.14	0.31±0.21 g	0.20±0.14 i	0.15±0.06j
TT0.1a	0.014±0.007 f	0.012±0.006	0.013±0.006h	0.010±0.007 i	0.007±0.003j

Values are presented as mean ± SD. P_0.1, mouth occlusion pressure; P_Emax, maximal expiratory pressure; P_Imax, maximal inspiratory pressure;T_I/T_TOT,inspiratory time ratio;T_T0.1,tension time index.

^aCalculated as:T_T0.1,(P_0.1/P_Imax) ×(T_I/T_TOT).

^bIn this case, n = 18.

^cIn this case, n = 22.

^dIn this case, n = 18.

^eIn this case, n = 23.

^fIn this case, n = 21.

^gIn this case, n = 26.

^hIn this case, n = 25.

ⁱIn this case, n = 18.

^jIn this case, n = 22.