Table 1.

Comparison of characteristics of primary school student participants recruited pre- and during COVID.

	Pre-COVID (n = 246)	COVID (n = 545)	P
Age, years, mean (SD)	8.5 (1.7)	8.8 (1.8)	.05
Female, n (%)	120 (48%)	272 (50%)	.75
Government-subsidized school, n (%)	246 (100%)	545 (100%)	1
Low-income household, n (%)	71 (28.9%)	136 (25.0%)	.25
Season at the time of assessment:			< .001
Spring (Mar–Apr), n (%)	0 (0%)	79 (14.5%)
Summer (May–Sept), n (%)	34 (13.8%)	158 (29.0%)
Autumn (Oct–Nov), n (%)	31 (12.6%)	110 (20.2%)
Winter (Dec–Feb), n (%)	181 (73.6%)	198 (36.3%)
Any mental disorder, n (%)	84 (34.1%)	219 (40.1%)	.027

SD = standard deviation.