Factors associated with optimal pain management in advanced cancer patients.

PURPOSE: To analyze clinical factors that were associated with inadequate pain control in cancer patients with metastatic malignancy and moderate to severe baseline pain.

PATIENTS: We retrospectively analyzed data from 260 advanced cancer patients who admitted to the First Hospital of Jilin University (Jilin, China) from January 2012-May 2013.

MEASUREMENTS: Statistical analysis was performed to assess the correlation between pain control and baseline characteristics including, gender, patient age, type of malignancy, presence of bone metastases, pain intensity, pain location, etiology of pain, type of pain, and presence of breakthrough pain.

MAIN RESULTS: A total of 75.4% of patients obtained satisfactory pain control (numerical rating scale ≤ 3) in 3 days. Baseline characteristics including gastrointestinal tumors (P = 0.032), severe pain (P < 0.001), and frequent breakthrough pain (P < 0.001) were independent risk factors of poor pain control in the 3-day treatment. These factors were also significantly associated with longer time needed to achieve stable pain control. Of the 185 patients treated with opioids, higher doses of analgesics were used in younger patients (<60 years old; P = 0.018), and in patients with severe pain (P < 0.001), neuropathic pain (P = 0.002), and frequent breakthrough pain (P = 0.015).

CONCLUSIONS: Factors associated with more difficult pain control include gastrointestinal tumor, severe baseline pain, presence of breakthrough pain, and neuropathic etiology of pain.