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Table 1 Number of subjects by grade and age at baseline and 6-month follow-up

From: Changes in quality of life among Norwegian school children: a six-month follow-up study

  

Baseline

Six-month follow-up

Grade

Age (years)

n

n

4th

8–10

505

490

6th

10–12

462

447

8th

12–14

492

383

10th

14–16

538

501

Total

8–16

1997

1821