Table 4.

Mean change in scores over four years, satisfaction rate, and opioid use^*.

	Mean Change in Score Compared with Baseline (Standard Error [SE]) or Percent		Difference (95% Confidence interval)†	P
	No Reherniation (n = 730)	Reherniation (n = 73)
SF-36 Bodily Pain (BP) (SE)††	44.9 (0.7)	39.5 (1.7)	5.4 (2.2, 8.6)	0.001
SF-36 Physical Function (PF) (SE)††	44.5 (0.6)	37.1 (1.5)	7.4 (4.5, 10.3)	<0.001
SF-36 Mental Component Summary (MCS)††	6.6 (0.3)	4.8 (0.7)	1.8 (0.5, 3.1)	0.008
Oswestry Disability Index (ODI) (SE) ‡	−38.3 (0.5)	−33.9 (1.2)	−4.4 (−6.7, −2.1)	<0.001
Sciatica Bothersomeness Index (SE)§	−10.5 (0.2)	−8.7 (0.5)	−1.8 (−2.7, −0.9)	<0.001
Very/somewhat satisfied with symptoms (%)	69.1	58.7	10.4 (2.8, 18)	0.008
Opioid use (%)	11.9	11.3	0.6 (−3.6, 4.8)	0.78

^*Scores are adjusted for age, sex, race, marital status, compensation, smoking status, asymmetric sensory decrease, asymmetric motor weakness, work lift demand, herniation location, working status, stomach comorbidity, depression, diabetes, other** comorbidity, self-rated health trend, duration of most recent episode, treatment preference, baseline score (for SF-36, ODI, and Sciatica Bothersomeness Index), and center.

^†Difference is the difference between no reherniation and reherniation.

^††The SF-36 scores range from 0 to 100, with higher score indicating less severe symptoms.

^‡The Oswestry Disability Index ranges from 0 to 100, with lower scores indicating less severe symptoms.

^§The Sciatica Bothersomeness index range from 0 to 24, with lower scores indicating less severe symptoms.

^**Other comorbidities include: stroke, diabetes, osteoporosis, cancer, fibromyalgia, cfs, PTSD, alcohol, drug dependency, heart, lung, liver, kidney, blood vessel, nervous system, hypertension, migraine, anxiety, stomach, bowel.