[Randomized clinical trial for primary care patients with neck pain: manual therapy versus electrical stimulation].

Objective: To compare the effectiveness of manual therapy (MT) versus transcutaneous electrical nervous stimulation (TENS) in reducing the intensity of pain in patients with subacute or chronic neck pain (NP) attended at primary care physiotherapy units (PCPU).

Design: Randomised clinical trial.

Setting: Thirteen PCPU in 4 health districts of the Community of Madrid, Spain.