What do systematic reviews say?

Pharmacological treatment vs a different pharmacological treatment

• Smoking cessation for people with chronic obstructive pulmonary disease 2016 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 166 participants
  GRADE not reported

Pharmacological treatment vs a different pharmacological treatment

Pharmacological treatment probably leads to higher point prevalence abstinence at longest compared with a different pharmacological treatment (moderate certainty).

• Smoking cessation for people with chronic obstructive pulmonary disease 2016 · Cochrane Headline outcomes only
  RR 2.5 [1.47, 4.26]
  1 study · 543 participants
  Moderate

Pharmacological treatment vs placebo

Pharmacological treatment leads to higher prolonged abstinence at longest compared with placebo (high certainty).

• Smoking cessation for people with chronic obstructive pulmonary disease 2016 · Cochrane Headline outcomes only
  RR 2.53 [1.83, 3.5]
  4 studies · 1429 participants
  High
• Smoking cessation for people with chronic obstructive pulmonary disease 2016 · Cochrane Headline outcomes only
  RR 2.6 [1.29, 5.24]
  1 study · 370 participants
  High
• Smoking cessation for people with chronic obstructive pulmonary disease 2016 · Cochrane Headline outcomes only
  RR 2.03 [1.26, 3.28]
  2 studies · 503 participants
  Moderate