Table 3 Baseline comparison of participants in the subgroup study
Characteristics | Intervention group (n = 214) | Control group (n = 177) | P Value |
|---|---|---|---|
Gender (%) | Â | Â | 0.184 |
Male | 116(54.2) | 84(47.5) | Â |
Female | 98(45.8) | 93(52.5) | Â |
Mean age ± SD (yrs) | 10.77 ± 2.14 | 10.42 ± 2.72 | 0.159 |
Nationality (%) | Â | Â | 0.352 |
Han nationality | 183(85.5) | 157(88.7) | Â |
Others | 31(14.5) | 20(11.3) | Â |
Region of habitation (%) | Â | Â | 0.460 |
Rural | 102(47.7) | 91(51.4) | Â |
Urban | 112(52.3) | 86(48.6) | Â |
Mean baseline SER ± SD | −0.83 ± 1.54 | −0.87 ± 1.68 | 0.825 |
Myopic parents(%) | Â | Â | 0.023 |
Yes | 72(33.6) | 41(23.2) | Â |
No | 142(66.4) | 136(76.8) | Â |
Paternal education(%) | Â | Â | 0.042 |
Primary school or less | 24(11.2) | 31(17.5) | Â |
Junior middle school | 121(56.5) | 108(61.0) | Â |
Senior middle school | 52(24.3) | 32(18.1) | Â |
College or above | 17(7.9) | 6(3.4) | Â |
Maternal education(%) | Â | Â | 0.001 |
Primary school or less | 27(12.6) | 37(20.9) | Â |
Junior middle school | 116(54.2) | 110(62.1) | Â |
Senior middle school | 56(26.2) | 28(15.8) | Â |
College or above | 15(7.0) | 2(1.1) | Â |
Family income per person (%) | Â | Â | 0.004 |
< 2000 RMB | 62(29.0) | 71(40.1) | Â |
2000-3999RMB | 106(49.5) | 91(51.4) | Â |
4000-5999RMB | 33(15.4) | 13(7.3) | Â |
6000-9999 RMB | 9(4.2) | 1(0.6) | Â |
10000+ RMB | 4(1.9) | 1(0.6) | Â |
Daily screen time* | 1.75 ± 0.83 | 1.75 ± 0.81 | 0.991 |
Daily study duration* | 1.55 ± 0.95 | 1.67 ± 0.88 | 0.179 |
Daily outdoor activity time* | 1.64 ± 0.97 | 1.78 ± 0.89 | 0.164 |