Objective To retrospectively analyze incidence and trends of retinopathy of prematurity (ROP) from 2004 to 2013 in Shenzhen. Methods A total of 9100 preterm children (5401 males, 3699 females) were screened for ROP in Shenzhen from January 2004 to June 2013 using binocular ophthalmoscope or RetCam Ⅱ. First examination was performed from 4-6 weeks after birth. The birth weight was 520-2990 g with an average of (1710±410) g.The gestational age were 24-36 weeks with an average of (31.57±1.99) weeks. The gestational age of 208 children were <28 weeks, 3608 children were 28-32 weeks, 3553 children was 33-34 weeks, 1731 children was >34 weeks. The ocular findings were recorded according to the International Classification of ROP and The Early Treatment for ROP. Only the more aggressive eye of bilateral asymmetrical cases was counted for statistical purpose, and the cases required surgeries were defined as severe cases. The 10 years period was divided into first phase (2004-2008) and second phase (2009-2013). The incidence of ROP and severe ROP of these two phases was compared and statistics was analyzed. Results In the past 10 years, the overall incidence of ROP and sever ROP in Shenzhen was 12.49% and 4.99% in this screen. The children were divided into 4 groups according to the birth weight, the ROP incidences of birth weight <1000 g, 1000-1499 g, 1500-1999 g and ≥2000 g were 62.62%, 28.40%, 11.34% and 3.63% respectively. The severe ROP incidences were 34.95%, 12.21%, 3.73% and 0.49% respectively in these birth weight groups. The children were divided into 4 groups according to gestational weeks, the ROP incidences of gestational age <28 weeks, 28-32 weeks, 33-34 weeks and >34 weeks were 67.31%, 25.27%, 7.22% and 3.87% respectively. Severe ROP incidences were 37.02%, 10.71%, 1.79% and 0.68% in these gestational age groups respectively. ROP and severe ROP incidences were decreased from 14.64% at first phase to 11.47% at second phase, and from 6.52% at first phase to 4.26% second phase respectively, the differences were statistical significant (χ²=26.96, 26.61; P<0.05). ROP and severe ROP incidence in <1000 g birth weight group at second phase were much less than the first phase (χ²=13.676, 5.271; P<0.05). In <28 weeks gestational age group, the ROP incidence was the same in first phase and second phase (χ²=0.843, P>0.05), but the severe ROP incidence at second phase was much less the first phase (χ²=4.757,P<0.05). Conclusion From 2004 to 2013, the incidences of ROP and severe ROP have decreased significantly in Shenzhen.

Citation： Cooperative Group of Shenzhen Retinopathy of Prematurity. The incidence of retinopathy of prematurity in Shenzhen during the past ten years. Chinese Journal of Ocular Fundus Diseases, 2014, 30(1): 12-16. doi: 10.3760/cma.j.issn.1005-1015.2014.01.004 Copy