Table 1. Changes in physical and ocular symptom scores after continuous computer gaming for 4 h.

Symptoms	Score, mean  ± SD		Significance*
	Before gaming	After gaming
Physical discomfort	0.39  ± 0.78	1.61  ± 1.24	t = 15.7, p < 0.001
Shoulder	0.48  ± 0.81	1.88  ± 1.19	t = 8.80, p < 0.001
Neck	0.44  ± 0.81	1.92  ± 1.21	t = 9.78, p < 0.001
Back	0.20  ± 0.53	1.16  ± 1.15	t = 6.60, p < 0.001
Headache	0.42  ± 0.91	1.46  ± 1.30	t = 6.76, p < 0.001
Ocular discomfort	0.50  ± 0.83	1.40  ± 1.22	t = 17.44, p < 0.001
Red eyes	0.48  ± 0.81	1.38  ± 1.09	t = 7.18, p < 0.001
Eyestrain	0.44  ± 0.79	1.58  ± 1.03	t = 8.32, p < 0.001
Itchy eyes	0.44  ± 0.79	0.82  ± 1.00	t = 2.57, p = 0.013
Tired eyes	0.94  ± 0.98	2.30  ± 1.09	t = 8.73, p < 0.001
Dry eyes	0.64  ± 1.01	1.64  ± 1.34	t = 6.86, p < 0.001
Teary eyes	0.34  ± 0.80	0.88  ± 1.14	t = 3.62, p < 0.001
Irritated eyes	0.34  ± 0.66	0.96  ± 1.12	t = 3.73, p < 0.001
Blurred vision	0.46  ± 0.73	1.60  ± 1.20	t = 7.28, p < 0.001
Aching eyes	0.40  ± 0.76	1.40  ± 1.29	t = 6.29, p < 0.001

Notes.

Symptoms were scored on a scale from 0 (none) to 4 (very severe).

SD

standard deviation

^*The p-values were determined using paired t-tests. Differences between the means were statistically significant (p < 0.05).