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Table 1 Demographic statistics of participants

From: Chinese version of the international positive and negative affect schedule short form: factor structure and measurement invariance

Variables

4111

Age (years)

14.24 ± 1.50

Gender

 Male

2002 (48.7%)

 Female

2104 (51.2%)

 Missing

5 (0.1%)

Grade

 7th

866 (21.1%)

 8th

1034 (25.2%)

 9th

1204 (29.2%)

 10th

587 (14.3%)

 11th

420 (10.2%)