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Table 4 Mixed effects logistic regressions with practice as a fixed effect showing combinations of invitation methods

From: Pre-notification and reminder SMS text messages with behaviourally informed invitation letters to improve uptake of NHS Health Checks: a factorial randomised controlled trial

Parameter

Estimate

(β)

Standard Error

Z-value

P-value

Odds Ratio (OR)

95% Confidence Interval for OR

Lower Upper

Variation between Practice

0.190

0.04

2.96

0.002

   

Intercept

−1.750

0.11

−13.14

.000

   

NoPre_Open-ended_Rem

0.521

0.129

4.03

0.000

1.684

1.307

2.170

NoPre_Open-ended_NoRem

0.248

0.132

1.88

0.060

1.281

0.990

1.658

NoPre_Timeltd_Rem

0.476

0.128

3.73

0.000

1.609

1.253

2.066

NoPre_Timeltd_NoRem

0.143

0.132

1.08

0.282

1.153

0.890

1.495

NoPre_Social_Norms_Rem

0.339

0.130

2.6

0.009

1.403

1.087

1.812

NoPre_Social_Norms_NoRem

0.077

0.132

0.58

0.560

1.080

0.834

1.397

NoPre_Ctr_Rem

0.302

0.125

2.42

0.016

1.353

1.059

1.728

Pre_Open-ended_Rem

0.325

0.130

2.5

0.012

1.384

1.073

1.786

Pre_Open-ended_NoRem

0.416

0.127

3.27

0.001

1.516

1.182

1.945

Pre_Timeltd_Rem

0.620

0.127

4.91

0.000

1.860

1.451

2.383

Pre_Timeltd_NoRem

0.377

0.128

2.95

0.003

1.457

1.134

1.872

Pre_Social_Norms_Rem

0.316

0.128

2.47

0.014

1.372

1.067

1.764

Pre_Social_Norms_NoRem

0.306

0.130

2.36

0.018

1.358

1.053

1.752

Pre_Ctr_Rem

0.313

0.128

2.45

0.014

1.367

1.065

1.756

Pre_Ctr_NoRem

0.213

0.131

1.63

0.104

1.237

0.958

1.598

GENDER (Ref: Female)

−0.314

0.044

−7.09

0.000

0.730

0.670

0.797

Asian (Ref: White)

0.006

0.113

0.06

0.955

1.006

0.807

1.255

Black

0.255

0.053

4.79

0.000

1.291

1.163

1.433

Other

−0.087

0.078

−1.11

0.268

0.917

0.786

1.069

Not stated/not known

−2.322

0.120

−19.36

0.000

0.098

0.078

0.124

Dep Quintile 2 (Ref: Quintile 1)

0.015

0.052

0.29

0.772

1.015

0.917

1.123

Dep Quintile 3

0.040

0.092

0.43

0.667

1.041

0.868

1.247

Dep Quintile 4

−0.150

0.166

−0.91

0.365

0.860

0.622

1.191

Dep Quintile 5

−0.192

0.389

−0.49

0.621

0.825

0.385

1.768

Dep Quintile Unknown

0.212

0.419

0.51

0.613

1.236

0.544

2.810

Age at invitation

0.012

0.003

4.49

0.000

1.012

1.007

1.018

  1. Residual maximum likelihood estimate of model parameters (β), Pre = Pre-notification, Rem = Reminder; Ctr = control letter, Open-ended = Open-ended letter, Timeltd = Time-limited letter, Social_Norms = Social norms letter
  2. Reference category: no prenotifcaiton, control letter and no reminder
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BMC Public Health

ISSN: 1471-2458

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