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Table 1 Demographic characteristics of the school sample by sex and grade

From: Headache prevalence and characteristics among school children as assessed by prospective paper diary recordings

 

Boys (n = 245)

Girls (n = 232)

Total (N = 477)

Grades

 6

61 (54.5%)

51 (45.5%)

112 (23.5%)

 7

47 (48%)

51 (52%)

98 (20.5%)

 8

58 (59.2%)

40 (40.8%)

98 (20.5%)

 9

63 (52.1%)

58 (47.9%)

121 (25.4%)

 11a

16 (33.3%)

32 (66.7%)

48 (10.1%)

Location

 City

147 (60%)

98 (40%)

245 (51.4%)

 Town

132 (57%)

100 (43%)

232 (48.6%)

  1. Number of subjects with percentages within parenthesis
  2. aSecond grade in high school