| Methods |
Design: three group parallel trial
Purpose: examine the effect of chiropractic care on jet lag |
| Participants |
Patients: junior elite athletes
Baseline comparability: NS |
| Interventions |
Placebo: sham chiropractic manipulations for 19 days
Untreated: no chiropractic sessions
Experimental: chiropractic sessions
(Co‐intervention: NS) |
| Outcomes |
Sleep disturbance (duration of sleep in hours, sleep onset in minutes, numbers of sleep bouts, movement and fragmentation index)
Jet lag rating
Mood (Profile of Mood States questionnaire) |
| Notes |
|
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Adequate sequence generation? |
Unclear risk |
'table of random numbers' |
| Allocation concealment? |
Unclear risk |
NS |
| Blinding?
Treatment provider |
High risk |
Not described as double‐blind (chiropractic manipulation/placebo manipulation) |
| Blinding?
Outcome assessor |
Unclear risk |
Not relevant as patient reported outcome |
| Incomplete outcome data addressed?
All outcomes |
High risk |
Drop‐out > 15% or NS |
| Free of selective reporting? |
Unclear risk |
No protocol available |
| Free of other bias? |
Low risk |
|
| No signs of variance inequality or skewness? |
Low risk |
No variance inequality (F‐test not statistically significant) and no skewness (1.64 standard deviations does not exceed the mean) |
| Trial size > 49? |
High risk |
N = 10 |
| Clearly concealed allocation + trial size > 49 + drop‐out max 15% |
High risk |
Trial size < 49 |
