Table 2.
Skin cancer status and clinic attendance
| History of NMSC |
Attendance at dermatology clinic |
|||
|---|---|---|---|---|
| Yes | No | Yes | No | |
| Responders, n/N (%) | 77/292 (26·4) | 215/292 (73·6) | 261/292 (89·4) | 31/292 (10·6) |
| M/F ratio | 1·6 (47/30) | 1·3 (120/95) P = 0·50a |
1·4 (154/107) | 0·7 (13/18) P = 0·08a |
| Mean ± SD age, years (range) | 58·6 ± 11·0 (31–82) 0 missing |
49·8 ± 13·3 (19–81) 1 missing P < 0·001b |
52·3 ± 13·0 (21–82) 1 missing |
50·7 ± 15·8 (19–80) 0 missing P = 0·54b |
| Mean ± SD time since treatment, years (range) | 16·8 ± 6·3 (2–33) 0 missing |
11·5 ± 7·5 (1–36) 2 missing P < 0·001b |
13·4 ± 7·3 (1–36) 2 missing |
9·1 ± 8·8 (1–29) 0 missing P = 0·003b |
| Skin type, n (%) | ||||
| I | 7(9·1) | 15 (7·0) | 19 (7·3) | 3 (9·7) |
| II | 16 (20·8) | 40 (18·6) | 50 (19·2) | 6 (19·4) |
| III | 31 (40·2) | 93 (43·2) | 114 (43·7) | 10 (32·2) |
| IV | 23 (29·9) | 63 (29·3) | 75 (28·7) | 11 (35·5) |
| Missing | 0 | 4 (1·9) P = 0·88a |
3 (1·1) | 1 (3·2) P = 0·61a |
| Photoprotection advice, n (%) | 77 (100) | 203 (94·4) P = 0·04a |
256 (98·1) | 24 (77·4) P < 0·001a |
| Use of sunscreen, n (%) | 76 (98·7) | 193 (89·8) P = 0·02a |
248 (95·0) | 21 (67·7) P < 0·001a |
| Skin type, n (%)c | ||||
| I | 7 (9·2) | 12 (6·2) | 18 (7·3) | 1 (4·8) |
| II | 16 (21·1) | 36 (18·7) | 49 (19·8) | 3 (14·3) |
| III | 31 (40·8) | 87 (45·1) | 109 (44·0) | 9 (42·9) |
| IV | 22 (29·0) | 58 (30·1) | 72 (29·0) | 8 (38·1) |
| Missing | 0 | 0 P = 0·78a |
0 | 0 P = 0·85a |
| SPF, n (%)c | ||||
| 2–5 | 0 | 1 (0·5) | 1 (0·4) | 0 |
| 8–10 | 1 (1·3) | 10 (5·2) | 7 (2·8) | 4 (19·1) |
| 15–25 | 19 (25·0) | 63 (32·6) | 76 (30·7) | 6 (28·6) |
| > 25 | 56 (73·7) | 117 (60·6) | 163 (65·7) | 10 (42·6) |
| Missing | 0 | 2 (1·0) χ2 (1) = 4·7, P trend = 0·03 |
1 (0·4) | 1 (4·8) χ2 (1) = 5·2, P trend = 0·02 |
| Frequency of sunscreen use, n (%)c | ||||
| Sunny | 38 (49·4) | 105 (54·4) | 130 (52·4) | 13 (61·9) |
| Daily all year | 11 (14·3) | 18 (9·3) | 27 (10·9) | 2 (9·5) |
| Daily part of year | 27 (35·1) | 69 (35·8) | 90 (36·3) | 6 (28·6) |
| Missing | 0 | 1 (0·5) P = 0·47a |
1 (0·4) | 0 P = 0·76a |
| Sun avoidance in summer, n (%) | ||||
| Never | 0 | 4 (1·9) | 3 (1·1) | 1 (3·2) |
| Sometimes | 4 (5·2) | 41 (19·1) | 40 (15·3) | 5 (16·1) |
| Usually | 37 (48·0) | 103 (47·9) | 129 (49·4) | 11 (35·5) |
| Always | 36 (46·8) | 61 (28·4) | 84 (32·2) | 13 (41·9) |
| Missing | 0 | 6 (2·8) χ2 (1) = 13·1, P trend < 0·001 |
5 (1·9) | 1 (3·2) χ2 (1) = 0·14, P trend = 0·71 |
| Dress to protect from the sun, n (%) | ||||
| Never | 3 (3·9) | 26 (12·1) | 24 (9·2) | 5 (16·1) |
| Sometimes | 13 (16·9) | 69 (32·1) | 72 (27·6) | 10 (32·3) |
| Usually | 34 (44·2) | 65 (30·2) | 92 (35·2) | 7 (22·5) |
| Always | 27 (35·0) | 48 (22·3) | 68 (26·1) | 7 (22·5) |
| Missing | 0 | 7 (3·3) χ2 (1) = 12·3, P trend < 0·001 |
5 (1·9) | 2 (6·5) χ2 (1) = 1·72, P trend = 0·19 |
| Understanding of reasons for extra photoprotection, n (%) | ||||
| Mention of ‘cancer’ | 48 (62·3) | 151 (70·2) | 186 (71·3) | 13 (41·9) |
| Other answers | 28 (36·4) | 47 (21·9) | 62 (23·8) | 13 (41·9) |
| Missing | 1 (1·3) | 17 (7·9) P = 0·03a |
13 (5·0) | 5 (16·1) P = 0·01a |
NMSC, nonmelanoma skin cancer; SPF, sun protection factor.
a
Two-tailed Fisher's exact test
b
two-tailed Student's t-test.
c
Restricted to people who answered positively for the question on sunscreen use.