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Table 2 No-Treatment Control Studies

From: The outcome of control groups in clinical trials of conservative treatments for chronic mechanical neck pain: a systematic review

STUDY CONTROL TREATMENT SAMPLE SIZE OF CONTROL GROUP BASELINE PAIN VAS SCORE [mean(sd)/100 mm] OUTCOME INTERVAL ABSOLUTE CHANGE (mm on VAS)* RELATIVE CHANGE (%) EFFECT SIZE QUALITY SCORE (Jadad Scale out of 5)
Chiu et al., 2004 [58] Infrared therapy and advice 78 43 (21) 6 weeks
6 months
-5
-4
-11.7%
-10.1%
.22
.17
3.5
Waling et al., 2000 [40] Education sessions for 2 hr, 1/week for 10 weeks 21 32 (23) 10 weeks -2 -6.2 .08 3
Viljanen et al., 2003 [43] No treatment 130 41 (22) 12 weeks
24 weeks
52 weeks
-14
-12
-9
-34.1
-29.2
-21.9
.59
.48
.38
3
Taimela et al., 2000 [41] No formal treatment 26 59.9 (19.6) 12 weeks
52 weeks
-20.9
not given
-33%
undet.
undet
undet
3
Lundblad et al., 1999 [58] No treatment 23 Usual pain = 20 (14)
Worst pain = 55 (28)
6 weeks
usual:
worst:
-9
-7
-45
-13
.64
.25
3
TOTAL/AVERAGE   278 46.2   For 1–10 wk = -5.7 [-8.6, -2.8] mm
For 12–52 wk = -11.9 [-17.4, -6.4] mm
For 1–10 wk = -10.3% [-14.4, -6.2]]
For 12–52 wk = -25.7% [-34.3, -17.1]
For 1–10 wk = .18 [-0.05, 0.41]
For 12–52 wk = .4 [0.12, 0.68]
 
  1. Caption: sd = standard deviation; undet = undetermined