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Table 2 The difference in variables by gender or school grade

From: Associations of physical activity with academic achievement and academic burden in Chinese children and adolescents: do gender and school grade matter?

  Total
(n = 2653)
Gender School grade
Boys
(n = 1294)
Girls
(n = 1359)
Primary
(n = 472,
9.1 ± 0.9ys)
Middle
(n = 1711,
13.2 ± 1.3ys)
High
(n = 470,
16.0 ± 0.7ys)
MVPA
  Meet the PA guidelines 284
(10.7%)
178
(13.8%)
106
(7.8%)
91
(19.3%)
165
(9.6%)
28
(6.0%)
  Not meet the PA guidelines 2369
(89.3%)
1116
(86.2%)
1253
(92.2%)
381
(80.7%)
1546
(90.4%)
442
(94.0%)
   p < 0.001   p < 0.001   
AA
  Above-average 1826
(68.9%)
430
(33.2%)
397
(29.2%)
237
(50.2%)
490
(28.6%)
100
(21.3%)
   ≤ Average 827
(31.1%)
864
(66.8%)
962
(70.8%)
235
(49.8%)
1221
(71.4%)
370
(78.7%)
   p < 0.05   p < 0.001   
AB
  No AB 262
(9.9%)
133
(10.3%)
129
(9.5%)
111
(23.5%)
137
(8.0%)
14
(3.0%)
  Having AB 2391
(90.1%)
1161
(89.7%)
1230
(90.5%)
361
(76.5%)
1574
(92.0%)
456
(97.0%)
   p = 0.50   p < 0.001   
  1. Notes: MVPA Moderate-to-Vigorous Physical Activity. PA guidelines (Physical Activity guidelines): World Health Organization recommendation for at least 60 min MVPA daily. Above-average AA: above-average academic achievement (included good and very good), AB: academic burden. ys: years old