Baseline 1
| Age 18 to 65 years
| Pregnancy
|
LBP with or without leg pain for more than 30 days during the past year
| Chiropractic treatment less than 3 months ago
|
Previous episodes
| Completely subsidized treatment from third party payer
|
Access to a mobile phone
| Serious pathology (i.e., acute trauma, cancer, infection, cauda equina, osteoporosis, vertebral fractures) or contraindications to manual therapy
|
Ability to send and receive SMS (text messages)
|
Baseline 2
| Self-rated “definitely improved” by the fourth treatment
| Self-rated improvement being anything but “definitely improved” by the fourth treatment
|
Study start | Interval between treatments is one month or more | Interval between treatments never extends to one month |