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Br J Ophthalmol 85:1044-1045 doi:10.1136/bjo.85.9.1044
  • Scientific correspondence

Is the partial pressure of carbon dioxide in the blood related to the development of retinopathy of prematurity?

Table 1

Mean (SD) and the variability of tcPco2 (in kPa) during the first 14 days of life in ROP1,2 and ROP3 group. Significance was defined as p⩽0.05 however there were no significant differences between the groups on any day

Day
1 2 3 4 5 6 7 8 9 10 11 12 13 14
ROP 1,2 tcPco 2 mean 5.3 (1.0) 5.9 (0.7) 6.1 (0.8) 6.0 (1.1) 5.9 (0.8) 6.2 (0.9) 6.6 (0.9) 6.4 (1.0) 6.1 (1.1) 6.6 (1.3) 6.8 (1.5) 6.5 (1.9) 6.8 (1.4) 7.1 (1.4)
ROP 3 tcPco 2 mean 5.7 (1.0) 6.1 (0.9) 6.2 (0.8) 6.4 (0.9) 6.2 (1.1) 6.2 (1.3) 6.7 (1.4) 6.8 (1.1) 6.8 (1.1) 6.9 (1.2) 7.1 (1.4) 6.7 (1.4) 6.6 (1.6) 7.1 (1.6)
ROP 1,2 tcPco 2variability 1.0 (0.3) 1.0 (0.3) 0.9 (0.4) 1.0 (0.2) 1.0 (0.4) 0.9 (0.2) 1.0 (0.3) 1.0 (0.4) 1.0 (0.2) 1.0 (0.4) 0.9 (0.4) 0.8 (0.1) 0.9 (0.2) 1.0 (0.5)
ROP 3 tcPco 2 variability 1.3 (0.5) 1.2 (0.5) 0.9 (0.3) 0.9 (0.3) 0.8 (0.2) 0.9 (0.2) 1.0 (0.5) 1.0 (0.4) 0.9 (0.3) 1.0 (0.3) 1.0 (0.5) 0.9 (0.4) 1.0 (0.2) 0.9 (0.4)

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