How to read 4/7? four out of seven?

Context:
RESULTS: Of the 9 patients, 5 patients had defect closure within 24 hours of birth, 3 had intrauterine closure and 1 had no prior surgery. Mean operative time was 183 (range 127-278) minutes. No intraoperative complications occurred. One patient developed permanent foot drop and 8 had transient lower extremity weakness. By 12 months, 7 of 9 had a documented cutaneous to bladder reflex. At 3 years, 2 patients did not return for follow-up and were considered non-responders. Seven patients returned for 36-month evaluation. On UDT, maximum cystometric capacity improved from mean 210 cc to 293 cc. At baseline 4/7 had neurogenic detrusor overactivity (NDO); at 36 months 1/7 had NDO. Median compliance improved from 12.2 ml/H20 to 28.4 ml/H2O and 3 with a baseline compliance of less than 10 had normalization (7 to 34.3, 9.4 to 21.2, and 8.3 to 28.4). At baseline, 2/7 were able to void with an average void of 23 cc. At 36 months, 6/7 no longer required catheterization and 6/7 reported mean voided volume of 156cc on voiding diaries. Uroflow demonstrated a mean voided volume of 248 cc with a 93 cc post void residual and a voiding efficiency of 73%. All 6 patients were voiding > 59% of their bladder capacity. 5 of 7 require some valsalva to void. 6/7 subjects had persistent stress incontinence with 1 subject dry, 3 with occasional leak, 3 frequent leaks. At baseline, 3/7 considered their bowels normal and 1/7 were continent of stool. At 36-months 6/7 considered bowels normal and 4/7 continent of stool. Antimuscarinics were stopped in all subjects except the 1 with persistent NDO. Renal ultrasounds and serum creatinines remained stable. No long-term complications were identified and 6/7 would undergo the procedure again.