Table 5Clinical evidence summary: Increased practical support and encouragement during follow-up + CPAP versus usual care + CPAP - Severe OSAHS

OutcomesNo of Participants (studies) Follow upQuality of the evidence (GRADE)Relative effect (95 % CI)Anticipated absolute effects
Risk with ControlRisk difference with Increased practical support and encouragement during follow-up + CPAP versus usual care + CPAP (95% CI)

CPAP Device Usage (hours/night)

Higher is better

1501

(14 studies)

⊕⊝⊝⊝

VERY LOW1,2,3

due to risk of bias, inconsistency, imprecision

The mean CPAP device usage (hours/night) in the control group was

3.6

The mean CPAP device usage (hours/night) in the intervention groups was

0.83 higher

(0.45 to 1.22 higher)

Days PAP used >4 hours at 12 months

Higher is better

23

(1 study)

⊕⊕⊝⊝

LOW2

due to imprecision

The mean days pap used >4 hours in the control group was 282 days

The mean days pap used >4 hours at 12 months in the intervention groups was

11 lower

(75.76 lower to 53.76 higher)

Days PAP used >4 hours at 3 months

Higher is better

294

(2 studies)

3 months

⊕⊕⊕⊕

HIGH

The mean days pap used >4 hours in the control group was 65.8 days

The mean days pap used >4 hours at 3 months in the intervention groups was

8.06 higher

(1.80 to 14.33 higher)

Mean adherence all days (min per day) at 12 months

Higher is better

23

(1 study)

⊕⊕⊕⊝

MODERATE2

due to imprecision

The mean adherence all days (min per day) at 12 months in the control group was

307

The mean adherence all days (min per day) at 12 months in the intervention groups was

45 higher

(20.99 lower to 110.99 higher)

CPAP use min/night

Higher is better

327

(1 study)

⊕⊕⊕⊕

HIGH

The mean CPAP use min/night in the control groups was

307

The mean CPAP use min/night in the intervention groups was

20 higher

(1.51 lower to 41.51 higher)

N deemed adherent (≥ four hours/night)

376

(2 studies)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, imprecision, indirectness

RR 1.19 (1.03 to 1.37)Moderate
635 per 1000

121 more per 1000

(from 19 more to 235 more)

Withdrawals

1702

(11 studies)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, imprecision, indirectness

RR 1.22 (0.97 to 1.52)Moderate
118 per 1000

26 more per 1000

(from 4 fewer to 61 more)

Epworth Sleepiness Scale - Comparison Endpoint or Change from Baseline Values - ESS: Endpoint Scores

Scale from 0-24

Lower is better

1527

(15 studies)

⊕⊕⊝⊝

LOW1,3

due to risk of bias, inconsistency

The mean epworth sleepiness scale - in the control groups was

3.16

The mean epworth sleepiness scale - comparison endpoint or change from baseline values - ESS: endpoint scores in the intervention groups was

0.28 lower

(0.73 lower to 0.16 higher)

Quality of Life: Comparison of Values at Endpoint - QoL: FOSQ – Endpoint

Scale from 5-20

Higher is better

109

(3 studies)

⊕⊕⊝⊝

LOW1,4

due to risk of bias, indirectness

The mean quality of life: FOSQ - in the control groups was

16.1

The mean quality of life: comparison of values at endpoint - QOL: FOSQ - endpoint in the intervention groups was

0.55 higher

(0.81 lower to 1.9 higher)

Quality of Life: Comparison of Values at Endpoint - QoL: SAQLI – Endpoint

Higher is better

240

(1 study)

⊕⊕⊝⊝

LOW1,4

due to risk of bias, indirectness

The mean quality of life: SAQLI in the control groups was

4.6

The mean quality of life: comparison of values at endpoint - QOL: SAQLI - endpoint in the intervention groups was

0.5 higher

(0.09 lower to 1.09 higher)

Quality of Life: Comparison of Values at Endpoint - QoL: SF-36 (PH) – Endpoint

Scale from 0-100

Higher is better

334

(3 studies)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, indirectness, imprecision

The mean quality of life: sf-36 (ph) - in the control groups was 46

The mean quality of life: comparison of values at endpoint - QOL: sf-36 (ph) - endpoint in the intervention groups was

1.09 higher

(0.34 lower to 2.52 higher)

Quality of Life: Comparison of Change from Baseline Values - QoL: FOSQ - Change from Baseline

Higher is better

39

(1 study)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, indirectness, imprecision

The mean quality of life: FOSQ - in the control groups was

1.1

The mean quality of life: comparison of change from baseline values - QOL: FOSQ - change from baseline in the intervention groups was

0.8 higher

(1.25 lower to 2.85 higher)

Quality of Life: Comparison of Change from Baseline Values - QoL: SF-36 (PH) - Change from Baseline

Higher is better

82

(1 study)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, indirectness, imprecision

The mean quality of life: sf-36 (ph) - in the control groups was 2.9

The mean quality of life: comparison of change from baseline values - QOL: sf-36 (ph) - change from baseline in the intervention groups was

0.3 higher

(3.1 lower to 3.7 higher)

Quality of Life: Comparison of Change from Baseline Values - QoL: FOSQ-10 - Change from Baseline

Higher is better

173

(1 study)

⊕⊝⊝⊝

VERY LOW1,2,4

due to risk of bias, indirectness, imprecision

The mean quality of life: fosq-10 - in the control groups was

−14.2

The mean quality of life: comparison of change from baseline values - QOL: fosq-10 - change from baseline in the intervention groups was

3.3 higher

(0.1 to 6.5 higher)

diastolic blood pressure

55

(1 study)

⊕⊕⊕⊝

MODERATE2

due imprecision

The mean diastolic blood pressure in the control groups was 82.8

The mean diastolic blood pressure in the intervention groups was

4.4 lower

(9.82 lower to 1.02 higher)

systolic blood pressure

55

(1 study)

⊕⊕⊕⊝

MODERATE,2

due imprecision

The mean systolic blood pressure in the control groups was 138.8

The mean systolic blood pressure in the intervention groups was

9.3 lower

(17.57 to 1.03 lower)

AHI on treatment - Comparison of Values at Endpoint

Lower is better

411

(5 studies)

⊕⊝⊝⊝

VERY LOW1,2,3

due to risk of bias, inconsistency, imprecision

The mean ahi on treatment performed in control group was

4.2

The mean ahi on treatment performed in the intervention groups was

0.80 higher

(0.66 lower to 2.25 higher)

Mortality (critical outcome)Not reported
1

Downgraded by 1 increment if the majority of the evidence was at high risk of bias and downgraded by 2 increments if the majority of the evidence was at very high risk of bias

2

Downgraded by one increment if the confidence interval crossed one MID and downgraded by two increments if the confidence interval crossed both MIDs. MID for machine usage (adherence)- 1 hour; Established MIDs for SF-36 physical/mental- 2/3 ; FOSQ- 2 ; ESS −2.5;SAQLI – 2. GRADE default MID (0.5XSD) used for all other continuous outcomes.

3

Downgraded by 1 or 2 increments for heterogeneity,unexplained by subgroup analysis. Random effect analysis used.

4

Downgraded by 1 or 2 increments because the majority of the evidence included an indirect or very indirect population respectively

*

Not sleepy in both groups

From: Adherence

Cover of Adherence
Adherence: Obstructive sleep apnoea/hypopnoea syndrome and obesity hypoventilation syndrome in over 16s: Evidence review N.
NICE Guideline, No. 202.
National Guideline Centre (UK).
Copyright © NICE 2021.

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