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Table 3 The summary of findings table for PICO #2: Hydromorphone (i.v.) vs. morphine (i.v.) for acute severe pain in the emergency department

From: Analgesia in the emergency department: a GRADE-based evaluation of research evidence and recommendations for practice

    

Anticipated absolute effects Time frame is 30 min

Outcomes

No of patients (studies) Follow-up

Quality of the evidence (GRADE)

Relative effect (95% Cl)

Rish with morphine

Rish difference with hydromorphone (95% Cl)

Change in pain score Mean change in numeric rating scale (NRS) [0 = no pain; 10 = worst pain possible]; scale from 0-10

374 (2 studies) 2 h

⊕⊕⊕O MODERATE2,3 due to indirectness

 

The mean change in pain score ranged across control groups from 3.3-4.1 NRS

The mean change in pain score in the intervention groups was 0.9 higher (0.35 to 1.75 higher)1

Serious adverse events

respiratory depression (RR < 12) or SpO2 < 95% or systolic blood pressure (SBP) < 90 mmHg or administration of naloxone after opioid administration

374 (2 studies) 2 h

⊕⊕OO

LOW3,4 due to indirectness, imprecision

RR 0.96 (0.91-1.02)

54 per 1,000

2 fewer per 1,000 (from 5 fewer to 1 more)4

Adverse effects

Nausea or vomiting or pruritus

374 (2 studies) 2 h

⊕⊕OO

LOW3,4 due to indirectness, imprecision

RR 0.96 (0.83-1.1)

299 per 1,000

12 fewer per 1,000 (from 51 fewer to 30 more)

The basis for the assumed risk (e. g., the median control group risk across studies) is provided in footnotes. The corresponding risk (and the 95% confidence interval [CI]) is based on the assumed risk in the comparison group and the relative effect of the intervention. RR: risk ratio

GRADE Working Groups grades of evidence

     

High quality:

Further research is very unlikely to change our confidence in the estimate of effect

Moderate quality:

Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate

Very low quality:

We are very uncertain about the estimate

  1. 1At 30 min, one study had a between-group NRS difference of 1.3 (0.5-2.2) in favor of hydromorphone.
  2. 2One of the studies did not do a Mini Mental State Examination (MMSE) on the elderly patients; and the other cited that the hydromorphone group had a higher baseline pain score.
  3. 3Both studies were conducted in an underserviced inner city hospital with 45-60% of the patients of Hispanic descent.
  4. 4the confidence interval from the calculated relative risk is quite wide.