Effects of hydrogen inhalation duration on symptom relief in elderly patients with knee osteoarthritis: A pilot study

Figure 1 Flow chart of subject inclusion. LT: Long-term; ST: Short-term.

Figure 2 Western Ontario and McMaster Universities Osteoarthritis Index total score and Western Ontario and McMaster Universities Osteoarthritis Index subscale scores between long-term group and short-term group. A: Western Ontario and McMaster Universities Osteoarthritis Index (ΔWOMAC) total score; B: ΔWOMAC pain score; C: ΔWOMAC stiffness score; D: ΔWOMAC function score. WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; LT: Long-term; ST: Short-term.

Figure 3 36-item Short-Form Health Survey between long-term group and short-term group. A: Δ Physical function; B: Δ Physical role; C: Δ Body pain; D: Δ General health; E: Δ Vitality; F: Δ Social function; G: Δ Emotion role; H: Δ Mental health. LT: Long-term; ST: Short-term.

Figure 4 Dose-response curve of cumulative hydrogen inhalation duration and Western Ontario and McMaster Universities Osteoarthritis Index scores. A: Western Ontario and McMaster Universities Osteoarthritis Index (ΔWOMAC) total score; B: ΔWOMAC pain score; C: ΔWOMAC function score; D: ΔWOMAC stiffness score. WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.