[Retracted] Myopia in Chinese Adolescents: Its Influencing Factors and Correlation with Physical Activities

Table 2

Analysis of the correlation between physical activity and myopia.

Parameter		Groups		Myopia rate
		Nonmyopia group	Myopia group
Regular physical activities	No	109	272	71.40%	11.190	0.001
	Yes	84	114	57.60%
Football	Rarely	135	299	68.90%	3.869	0.049
	Occasionally	58	87	60.00%
Basketball	Rarely	79	194	71.10%	4.491	0.034
	Occasionally	114	192	62.70%
Ping pang	Rarely	112	283	71.60%	13.866	<0.001
	Occasionally	81	103	56.00%
Track and field	Rarely	75	186	71.30%	4.520	0.033
	Occasionally	118	200	62.90%
Swimming	Rarely	112	271	70.80%	8.519	0.004
	Occasionally	81	115	58.70%
Tennis	Rarely	127	285	69.17%	4.044	0.044
	Occasionally	66	101	60.48%
Badminton	Rarely	82	206	71.50%	6.093	0.014
	Occasionally	111	180	61.90%
Volleyball	Rarely	68	180	72.58%	6.828	0.009
	Occasionally	125	206	62.24%
Dance	Rarely	54	143	72.60%	4.713	0.030
	Occasionally	139	243	63.60%
Attitude to physical education #		4 (3~4)	3 (3~4)		-3.284	0.001
Negative		96	134	34.70%
Indifferent		27	64	16.60%
Positive		58	157	40.70%
Very positive		12	31	8.00%
Daily time spent on in-school physical activities #		2 (1~3.5)	3 (2~4)		-5.074	<0.001
<20 minutes		48	111	28.80%
20-40 minutes		29	113	29.30%
40-60 minutes		43	123	31.90%
>60 minutes		73	39	10.10%
After-school physical activities #		3 (2~4)	3 (2~4)		-2.209	0.027
Rarely		72	116	30.10%
Occasionally		46	92	23.80%
Sometimes		61	127	32.90%
Often		14	51	13.20%
Eye exercises #		2 (1~3)	1 (1~2)		-3.453	0.001
Never		84	217	56.20%
Rarely		51	107	27.70%
Occasionally		42	36	9.30%
Often		16	26	6.70%

Factors ending with # are not normally distributed according to the results of the SW normality test.