Table 5.
Prevalence of high normal blood pressure and hypertension according to JSH 2004 in each grade of Japanese school children
| Variable | No. | Systolic blood pressure (mmHg) |
Diastolic blood pressure (mmHg) |
|||
|---|---|---|---|---|---|---|
| High normal | Hypertension | High normal | Hypertension | |||
| Boys (n=3,059) | ||||||
| 1st graders | 344 | 2 (0.6) | 0 (0) | 2 (0.6) | 2 (0.6) | |
| 2nd graders | 347 | 3 (0.9) | 1 (0.3) | 3 (0.9) | 1 (0.3) | |
| 3rd grades | 363 | 3 (0.8) | 1 (0.3) | 4 (1.1) | 1 (0.3) | |
| 1st–3rd graders | 1,054 | 8 (0.8) | 2 (0.2) | 9 (0.9) | 4 (0.4) | |
| 4th graders | 368 | 4 (1.1) | 0 (0) | 2 (0.5) | 0 (0) | |
| 5th graders | 378 | 9 (2.4) | 0 (0) | 8 (2.1) | 0 (0) | |
| 6th graders | 356 | 7 (2.0) | 1 (0.3) | 1 (0.3) | 0 (0) | |
| 4th–6th graders | 1,102 | 20 (1.8) | 1 (0.1) | 11 (1) | 0 (0) | |
| 7th graders | 299 | 11 (3.7) | 4 (1.3) | 11 (3.7) | 2 (0.7) | |
| 8th graders | 298 | 10 (3.4) | 13 (4.4) | 9 (3.0) | 0 (0) | |
| 9th graders | 306 | 35 (11.4) | 7 (2.3) | 15 (4.9) | 0 (0) | |
| 7th–9th graders | 903 | 56 (6.2) | 24 (2.7) | 35 (3.9) | 2 (0.2) | |
| All boys | 3,059 | 84 (2.7) | 27 (0.9) | 55 (1.8) | 6 (0.2) | |
| Girls (n=3,221) | ||||||
| 1st graders | 372 | 2 (0.5) | 0 (0) | 0 (0) | 0 (0) | |
| 2nd graders | 371 | 2 (0.5) | 0 (0) | 0 (0) | 0 (0) | |
| 3rd grades | 369 | 1 (0.3) | 0 (0) | 0 (0) | 0 (0) | |
| 1st–3rd graders | 1,112 | 5 (0.4) | 0 (0) | 0 (0) | 0 (0) | |
| 4th graders | 371 | 8 (2.2) | 0 (0) | 8 (2.2) | 0 (0) | |
| 5th graders | 370 | 6 (1.6) | 4 (1.1) | 5 (1.4) | 1 (0.3) | |
| 6th graders | 366 | 8 (2.2) | 3 (0.8) | 5 (1.4) | 1 (0.3) | |
| 4th–6th graders | 1,107 | 22 (2.0) | 7 (0.6) | 18 (1.6) | 2 (0.2) | |
| 7th graders | 315 | 27 (8.6) | 3 (1.0) | 17 (5.4) | 3 (1.0) | |
| 8th graders | 336 | 17 (5.1) | 10 (3.0) | 19 (5.7) | 3 (0.9) | |
| 9th graders | 351 | 27 (7.7) | 9 (2.6) | 29 (8.3) | 2 (0.6) | |
| 7th–9th graders | 1,002 | 71 (7.1) | 22 (2.2) | 65 (6.5) | 8 (0.8) | |
| All girls | 3,221 | 98 (3.0) | 29 (0.9) | 83 (2.6) | 10 (0.3) | |