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Table 2 Number and percentage of invitations sent out according to the method of invitation

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

  

No pre-notification

SMS pre-notification

p-valuea

Control letter

Open-ended letter

Time-limited letter

Social norms letter

p-value

No reminder

SMS reminder

p-value

Sex [n (%)]

Female

2771 (45.1)

2754 (45.1)

0.976

1402 (42.7)

1347 (46.3)

1375 (45.9)

1401 (45.9)

0.012

2785 (45.3)

2740 (45.0)

0.696

Male

3368 (54.9)

3351 (54.9)

 

1883 (57.3)

1561 (53.7)

1621 (54.1)

1654 (54.1)

 

3363 (54.7)

3356 (55.1)

 

Age at initiation [mean (s.d.)]

Years

47.9 (8.1)

48.0 (8.1)

0.645b

48.1 (8.2)

47.8 (8.0)

47.8 (8.0)

47.9 (8.2)

0.312b

48.0 (8.14)

47.8 (8.04)

0.2983

Ethnicity [n (%)]

White

2584 (42.1)

2654 (43.5)

0.035

1378 (42.0)

1257 (43.2)

1306 (43.6)

1300 (42.6)

0.353

2591 (42.1)

2650 (43.5)

0.106

Asian

214 (3.5)

261 (4.3)

 

118 (3.6)

118 (4.1)

111 (3.7)

128 (4.2)

 

245 (4.0)

230 (3.8)

 

Black

1732 (28.2)

1664 (27.3)

 

919 (28.0)

816 (28.1)

812 (27.1)

849 (27.8)

 

1687 (27.4)

1709 (28.0)

 

Other

591 (9.6)

594 (9.7)

 

309 (9.4)

285 (9.8)

313 (10.5)

278 (9.1)

 

595 (9.7)

590 (9.7)

 

Not recorded

1015 (16.5)

932 (15.3)

 

561 (17.1)

432 (14.9)

454 (15.2)

500 (16.4)

 

1030 (16.8)

917 (15.0)

 

Deprivation Quintile [n (%)]

1 – most deprived

2591 (42.2)

2539 (41.6)

0.183

1418 (43.2)

1197 (41.2)

1243 (41.5)

1272 (41.6)

0.097

2587 (42.1)

2543 (41.7)

0.855

2

2713 (44.2)

2720 (44.6)

 

1432 (43.6)

1298 (44.6)

1323 (44.2)

1380 (45.2)

 

2734 (44.5)

2699 (44.3)

 

3

593 (9.7)

644 (10.6)

 

330 (10.1)

312 (10.7)

292 (9.8)

303 (9.9)

 

608 (9.9)

629 (10.3)

 

4

216 (3.5)

182 (3.0)

 

90 (2.7)

91 (3.1)

128 (4.3)

89 (2.9)

 

194 (3.2)

204 (3.4)

 

5 – least deprived

26 (0.4)

20 (0.3)

 

15 (0.5)

10 (0.3)

10 (0.3)

11 (0.4)

 

25 (0.4)

21 (0.3)

 

Total

 

6139 (100)

6105 (100)

 

3285 (100)

2908 (100)

2996 (100)

3055 (100)

 

6148 (100)

6096 (100)

 
  1. a Chi2 test unless otherwise specified b One-way analysis of variance