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Table 2 Surgical treatment, radiotherapy and adjuvant therapy for women living in affluent and deprived areas (whole sample and questionnaire respondents)

From: The impact of consent on observational research: a comparison of outcomes from consenters and non consenters to an observational study

 

AFFLUENT n (%)

DEPRIVED n (%)

Chi squared test result

 

WHOLE SAMPLE

CONSENTED SAMPLE

WHOLE SAMPLE

CONSENTED SAMPLE

WHOLE SAMPLE

CONSENTED SAMPLE

BREAST SURGERY

n = 142*

n = 75**

n = 215*

n = 97**

  

Mastectomy

64 (45.1%)

37 (49.3%)

104 (48.4%)

43 (44.3%)

X2 = 0.37 DF = 3

X 2 = 0.43 DF = 1

Conservation

78 (54.9%)

38 (50.7%)

111 (51.6%)

54 (55.7%)

p = 0.54

p = 0.54

AXILLA SURGERY

n = 129*

n = 70*

n = 196 *

n = 94**

  

Clearance

123 (95.3%)

68 (97.1%)

146 (74.5%)

69 (73.4%)

X2 = 23.73 DF = 1

X 2 = 16.4 DF = 1

Sampling

6 (4.7%)

2 (2.9%)

50 (25.5%)

25 (36.6%)

p = 0.0000

p = 0.000

RADIOTHERAPY

n = 146

54 (37.0%)

n = 72**

22 (30.6%)

n = 220

90 (40.9%)

n = 98**

50 (51.0%)

X2 = 0.56 DF = 1 p = 0.45

X 2 = 5.82 DF = 1 p = 0.018

CHEMOTHERAPY

n = 146

29 (19.9%)

n = 75**

13 (16.9%)

n = 220

30 (13.6%)

n = 100**

15 (15%)

X2 = 2.51 DF = 1 p = 0.11

X 2 = 0.116 DF = 1 p = 0.84

ENDOCRINE THERAPY

n = 146

128 (87.7%)

n = 77

71 (92.2%)

n = 220

196 (89.1%)

n = 100

92 (92.0%)

X2 = 0.17 DF = 1 p = 0.67

X 2 = 0.003 DF = 1 p = 1.0

  1. *Total n for whole sample < 366 due to missing data
  2. **Total n for consented sample < 177 due to missing data