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007). Adjusting vitamin D levels for confounding variables, linear regression underscored significant differences in the association between length of hospitalization and lower vitamin D levels, with a longer stay noted in insufficient groups (P = 0.002). However, there was no significant difference in the time interval to return to normal oxygen level (from SpO2 93%) or death rate between groups (P 0.05). There was a significant association between hospital stay and lower serum vitamin D levels. However, the relationship betw