Table 1. 20-m SRT (number of laps) centiles by age and sex for 69,960 Chinese children and youth aged 9–17 years.
|
Age(yr) |
P5 |
P10 |
P20 |
P30 |
P40 |
P50 |
P60 |
P70 |
P80 |
P90 |
P95 |
Boy |
9 |
8 |
10 |
13 |
15 |
18 |
20 |
23 |
26 |
29 |
35 |
40 |
10 |
9 |
12 |
15 |
18 |
21 |
23 |
26 |
30 |
34 |
41 |
47 |
11 |
11 |
14 |
18 |
21 |
24 |
27 |
30 |
34 |
39 |
47 |
53 |
12 |
13 |
16 |
20 |
24 |
28 |
31 |
35 |
39 |
45 |
53 |
61 |
13 |
14 |
18 |
23 |
27 |
31 |
35 |
40 |
45 |
51 |
60 |
69 |
14 |
16 |
20 |
26 |
30 |
35 |
39 |
44 |
49 |
56 |
67 |
76 |
15 |
17 |
22 |
28 |
33 |
37 |
42 |
47 |
53 |
60 |
72 |
82 |
16 |
19 |
23 |
29 |
35 |
40 |
44 |
50 |
56 |
64 |
75 |
86 |
17 |
19 |
24 |
31 |
36 |
41 |
46 |
52 |
58 |
66 |
78 |
89 |
Girls |
9 |
8 |
10 |
13 |
15 |
17 |
19 |
21 |
24 |
27 |
32 |
37 |
10 |
10 |
12 |
14 |
17 |
19 |
21 |
24 |
27 |
31 |
36 |
42 |
11 |
11 |
13 |
16 |
19 |
21 |
24 |
26 |
30 |
34 |
40 |
46 |
12 |
12 |
14 |
17 |
20 |
23 |
26 |
29 |
32 |
36 |
43 |
50 |
13 |
12 |
15 |
19 |
22 |
24 |
27 |
30 |
34 |
39 |
46 |
52 |
14 |
13 |
16 |
20 |
23 |
26 |
29 |
32 |
35 |
40 |
48 |
55 |
15 |
14 |
16 |
20 |
23 |
26 |
29 |
33 |
37 |
41 |
49 |
56 |
16 |
14 |
17 |
21 |
24 |
27 |
30 |
33 |
37 |
42 |
50 |
57 |
17 |
14 |
17 |
21 |
24 |
27 |
31 |
34 |
38 |
43 |
50 |
58 |
Ages shown represent age at last birthday (e.g. 9 = 9.0–9.99).