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Table 2

Frequency of neck, mid back, and low back pain at age 11–13 and two years later

 
11-13 yr. (n = 1291)
13-15 yr. (n = 1064)
 
 
Girls (n = 625)
Boys (n = 666)
Girls (n = 499)
Boys (n = 565)
LocationFrequencyn%95% CIn%95% CIn%95% CIn%95% CI
NP
Never
134
21.4
18.2, 24.7
176
26.4
23.1, 29.8
91
18.2
14.9, 21.6
155
27.4
23.8, 31.1
 
Once/twice
264
42.2
38.4, 46.1
252
37.8
34.2, 41.5
177
35.5
31.3, 39.7
194
34.3
30.4, 38.3
 
Sometimes
179
28.6
25.1, 32.2
196
29.4
26.0, 32.9
183
36.7
32.4, 40.9
168
29.7
26.0, 33.5
 
Often
48
7.7
5.6, 9.8
42
6.3
4.5, 8.2
48
9.6
7.0, 12.2
48
8.5
6.2, 10.8
 
Missing values
0
 
 
0
 
 
0
 
 
0
 
 
MBP
Never
243
38.9
35.1, 42.7
278
41.8
38.1, 45.5
160
32.1
38.0, 36.2
228
40.4
36.4, 44.5
 
Once/twice
234
37.4
33.6, 41.2
229
34.4
30.8, 38.1
180
36.1
31.9, 40.3
183
32.5
28.6, 36.3
 
Sometimes
112
17.9
14.9, 20.9
115
17.3
14.4, 20.2
117
23.5
19.7, 27.2
108
19.2
15.9, 22.4
 
Often
36
5.8
3.9, 7.6
43
6.5
4.6, 8.3
42
8.4
6.0, 10.9
45
8.0
5.7, 10.2
 
Missing values
0
 
 
1
 
 
0
 
 
1
 
 
LBP
Never
321
51.5
47.6, 55.4
394
59.3
55.5, 63.0
205
41.2
36.8, 45.5
306
54.3
50.1, 58.4
 
Once/twice
191
30.7
27.0, 34.3
181
27.2
23.8, 30.6
141
28.3
24.4, 32.3
143
25.4
21.8, 28.9
 
Sometimes
73
11.7
9.2, 14.2
64
19.6
7.4, 11.9
92
18.5
15.1, 21.9
86
15.3
12.3, 18.2
 
Often
38
6.1
4.2, 8.0
26
3.9
2.4, 5.4
60
12.1
9.2, 14.9
29
5.1
3.3, 7.0
 Missing values2  1  1  1  

CI = Confidence intervals; LBP = Low back pain; MBP = Mid back pain; NP = Neck pain.

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