A 4-week LAA intervention included low-level laser acupuncture and auricular acupressure. Six acupuncture points were selected, and three auricular points. Participants received laser acupuncture on the six selected acupuncture points bilaterally twice a week for 4 weeks. A seed was taped onto each of the three points of the unilateral ear (initially, the left ear), where it remained for five days. Pressing on each of the seeds for one minute three times a day was required, but the stimulation intensity was adjusted depending on the participant's individual tolerance. After five days, the seed was removed, and a new seed was taped on the other ear.

Control participants received a similar intervention, but without laser energy output or acupressure.

Participants received laser acupuncture on the six selected acupuncture points bilaterally twice a week for 4 weeks. A seed was taped onto each of the three points of the unilateral ear (initially, the left ear), where it remained for five days. Pressing on each of the seeds for one minute three times a day was required, but the stimulation intensity was adjusted depending on the participant's individual tolerance. The de qi sensation appears to be an established intervention efficacy indicator during auricular acupressure. After five days, the seed was removed, and a new seed was taped on the other ear.

Primary pain outcomes were measured by the Chinese version of the Brief Pain Inventory-Short Form (BPI-SF), which consists of 11 items to measure pain intensity and interference with functionality. Regarding pain severity, 4 items allow patients to rate their pain experience in the past 24 hours or one week at its average, worst, and least levels, as well as their pain experience now, on an 11-point Likert-type scale (0 = no pain, 10 = most severe pain).

Secondary outcomes were aspects of life dysfunction as measured by the Roland Morris Disability Questionnaire (RMDQ), which measures disability in daily life due to LBP. This questionnaire consists of 24 items, each one a statement that the patient is asked to indicate whether this statement applies to him/her.