Table 2.

Long-term results of operations for lumbar disc herniation

Authors [Ref.]	Patients, n	Mean follow-up, years	Good/excellent results, s%
Asch et al. [2]	212	2	80
Atlas et al.[3]	217	10	69
Bakhsh [4]	39	10	79
Butterman [5]	100	2.5	92
Casal-Moro et al. [6]	120	5	95
Chang et al. [8]	26	3	Not given
Cooper and Feuer [10]	100	2	94
Davis [11]	984	10.8	89
Dewing et al. [12]	183	2.1	85
Dvorak [14]	371	10.5	72
Ebeling et al. [15]	485	2	73
Findlay et al. [16]	79	10	83
Gurdjian et al. [18]	623	9	74
Hsu et al. [20]	226	2	82
Jansson et al. [21]	22,261	6	78
Jensdottir et al. [22]	134	20.7	91
Kotilainen et al. [23]	237	2	92
Lewis et al. [26]	83	7.5	89
Liu et al. [27]	82	6.4	84
Loupasis et al. [28]	109	12.7	64
Mariconda et al. [29]	201	27.8	90
Marin [30]	600	10	83
Martinez Quinones et al. [32]	142	5	93
Moore et al. [34]	100	8.6	93
Naylor [35]	204	17.5	79
Nykvist et al. [36]	197	12.9	81
Österman et al. [37]	28	2	93
Padua et al. [38]	120	12.1	77
Papavero and Caspar [39]	200	Not given	79
Pappas et al. [40]	654	1.5	96
Parker et al. [41]	111	3.1	68
Peul et al. [42]	125	2	81
Salenius and Laurent [43]	695	6	63
Schoeggl et al. [44]	672	6.3	77
Schramm et al. [45]	3,238	4	80
Silverplats et al. [46]	140	7.3	70
Spangfort [47]	2,503	Not given	77
Tregonning et al. [48]	91	9.7	63
Vik et al. [49]	124	8.5	81
Weber [50]	56	4	86
Weinstein et al. [51]	245	4	84
Williams [52]	530	3	91
Woertgen et al. [53]	98	2.3	66
Wu et al. [54]	1,231	2.3	77
Yorimitsu et al. [56]	72	14.3	87
Total	39,048
Mean		6.1	78.9