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Table 1 Demographic and clinical data at baseline

From: Anxiety and its predictive value for pain and regular analgesic intake after lumbar disc surgery - a prospective observational longitudinal study

Number 106
Mean age (standard deviation) 58.8 (16.5)
95% confidence interval of age 55.7–62.0
Range of age 24.4–86.9
Number of females (%) 51 (48.1)
Without partnershipa (%) 31 (30.7)
Educational level b
Number of “low” b (%), up to 9 school years 48 (49.0)
Number of “medium” b (%), 10 school years 26 (26.5)
Number of “high” b (%),12 or more school years 24 (24.5)
Mean preoperative anxiety c (standard deviation) 5.0 (3.8)
Number of anxiety cases c (N, %) 45 (42.5)
 Mild anxiety (GAD-7 score 6–9) (N, %) 35 (33.0)
 Moderate anxiety (GAD-7 score 10–14) (N, %) 7 (6.6)
 Severe anxiety (GAD-7 score > =15) (N, %) 3 (2.8)
Mean body mass index (standard deviation) 27.9 (4.4)
Preoperative ASA (American Society of Anesthesiologists physical status classification system)
ASA 1 (%) 9 (8.5)
ASA 2 (%) 51 (48.1)
ASA 3 (%) 45 (42.5)
ASA 4 (%) 1 (0.9)
Mean duration of surgery in minutes (standard deviation) 117 (53)
95% confidence interval of duration of surgery 107–127
Range of duration of surgery 40–299
  1. a 101 non-missing values;
  2. b 98 non-missing values;
  3. c Generalized Anxiety Disorder 7-Item Scale: > 5 = anxiety case