Table 2.

Logistic regression between abnormal oximetry measures and steady-state vitamin C deficiency, N=23

Variable	Vitamin C sufficient (%)	Vitamin C deficient (%)	OR [95% CI], p value
Mean daytime SpO2 <96%	3/12 (25)	6/11 (54.6)	3.60 [0.62 – 21.03], p = 0.155
Mean overnight SpO2 <94%	2/12 (16.7)	2/11 (18.2)	1.11 [0.13 – 9.61], p = 0.92
Delta 12 s Index >0.4	2/12 (16.7)	7/11 (63.7)	8.75 [1.24 – 61.7], p = 0.029
Overnight SpO2 dips (> 3%) >4/h	5/12 (41.7)	8/11 (72.7)	3.77 [0.65 – 21.6], p = 0.14

SpO₂ haemoglobin oxygen saturation