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Summary of results from the control and 3 study groups
GroupControl Group: Non-SIHStudy Group 1: SIH+/CSF Leak−/ Hyperdense Vein−Study Group 2: SIH+/CSF Leak+Study Group 3: SIH+/ Hyperdense Vein+
Included patients (No.)47834417
Mean age (range) (yr)66 (35–91)59 (31–87)54 (28–71)56 (37–84)
Male sex62%45%36%41%
Mean intrathecal contrast volume injected (range) (mL)14 (10–20)15 (12–20)13 (6–20)14 (12–18)
Initial CTM
    All patients: mean time from contrast injection to initial CTM (range) (min)35 (19–101)40 (2–113)20 (2–87)41 (4–83)
    Patients with renal contrast (No.) (%)0/47 (0%)10/83 (12%)1/44 (2%)7/17 (41%)
    Patients with renal contrast: mean time from contrast injection to initial CTM (range) (min)NA61 (17–96)Contrast injection time not documented in this patient37 (4–62)
Delayed imaging
    Patients with delayed imaging (No.) (%)0/47 (0%)73/83 (88%)11/44 (25%)15/17 (88%)
    All patients: mean time from contrast injection to delayed CTM (range) (min)NA199 (79–364)162 (93–325)195 (100–386)
    Patients with renal contrast (No.) (%)NA23/73 (32%)3/11 (27%)8/15 (53%)
    Patients with renal contrast: mean time from contrast injection to delayed imaging (range) (min)NA220 (126–364)211 (97–325)184 (100–386)
  • Note:—NA indicates not applicable.