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Table 5 Association of per cent of students reporting each performance measure as "yes" with frequency of being extremely sleepy at school

From: "Sleepiness" is serious in adolescence: Two surveys of 3235 Canadian students

   Total Grades down n (%) Lates n (%) Activity down n (%) Miss social/sports n (%)
All students HW 2201 497(22.6) 1037(47.1) 374(17.0) 440(20.0)
  GE 1034 252(24.3) 404(39.1) 189(18.3) 218(21.1)
Extremely sleepy       
Often HW 295 157(53.2) 191(64.4) 126(43.1) 118(40.0)
  GE 149 86(57.7) 86(57.4) 76(50.7) 63(42.3)
Sometimes HW 869 230(26.5) 453(52.1) 169(19.5) 202(23.2)
  GE 442 125(28.2) 203(45.9) 86(19.5) 110(24.9)
Seldom HW 768 97(12.6) 304(39.6) 66(8.6) 96(12.5)
  GE 357 41(11.5) 95(26.6) 27(7.6) 44(12.4)
Never HW 269 13(4.9) 89(33.2) 11(4.1) 15(5.6)
  GE 86 0(0.0) 21(24.4) 0(0.0) 1(1.2)