Does prolonged prone position affect intracranial pressure? prospective observational study employing Optic nerve sheath diameter measurements

Table 3 Right and left ONSD values during prone position

	Baseline (T₀)	Post-Prone 1 h (T₁)	Post-Prone 4 h (T₄)	Post-Prone 8 h (T₈)	Post-Prone 12 h (T₁₂)	Post-Prone 16 h (T₁₆)	Post-Prone 20 h (T₂₀)	Post-Prone 24 h (T₂₄)	p
Right ONSD ^mm	5.03 ± 0.43	4.96 ± 0.41	4.89 ± 0.34	4.90 ± 0.36	4.93 ± 0.36	4.90 ± 0.31	4.93 ± 0.33	4.93 ± 0.31	0.182
Post-hoc p	T ₀ -T ₁ -	T ₁ -T ₄ -	T ₄ -T ₈ -	T ₈ -T ₁₂ -	T ₁₂ -T ₁₆ -	T ₁₆ -T ₂₀ -	T ₂₀ -T ₂₄ -	T ₀ -T ₂₄ -
Left ONSD ^mm	4.98 ± 0.40	4.95 ± 0.39	4.92 ± 0.39	4.92 ± 0.39	4.91 ± 0.34	4.91 ± 0.29	4.92 ± 0.33	4.94 ± 0.34	0.733
Post-hoc p	T ₀ -T ₁ -	T ₁ -T ₄ -	T ₄ -T ₈ -	T ₈ -T ₁₂ -	T ₁₂ -T ₁₆ -	T ₁₆ -T ₂₀ -	T ₂₀ -T ₂₄ -	T ₀ -T ₂₄ -

All ONSD values are given as mean ± standard deviation due to normality of distribution. These variables were analyzed with the repeated measures analysis of variance

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