A Retrospective Study: Clinical Characteristics and Lifestyle Analysis of Chinese Senile Gluteal Dermatosis Patients

Figures & data

Table 1 Clinical Features of SGD Group and Non-SGD Group

	SGD group	Non-SGD group	P value
Subjects, n	36	194
Age (mean±SD)	84.2±12.6	41.1±14.1	<0.001
BMI (kg/m^2, mean±SD)	21.7±3.8	26.7±3.5	<0.001
Gender, n (%)
Male	24 (66.6)	77 (39.7)	0.03
Female	12 (33.3)	117 (60.3)
Average sitting time per day, n (%)			0.014
≥8 h	20 (55.5)	66 (34.0)
<8 h	16 (44, 4)	128 (66.0)
Type of chair, n
Bamboo chair	15	44	0.017
Sofa	21	150
Medical history
Hypertension	22	67	0.003
Coronary artery disease	12	65	0.984
Type 2 diabetes	10	48	0.700

Abbreviation: BMI, body mass index.

Table 2 Clinical Features of Ulcer Group and Non-Ulcer Group (Brownish Scaly Patch and Erythema)

Lesion	Ulcer	Non-ulcer	P value
Subject, n	26	10
BMI (kg/m^2, mean±SD)	22.4±4.3	20.4±2.2	0.171
Type of chair, n			0.001
Bamboo chair	5 (19.2)	8 (80.0)
Sofa	21 (80.7)	2 (20.0)
Average sitting time per day, n (%)			<0.001
≥8 h	11 (42.3)	9 (90.0)	0.022
<8 h	15 (57.7)	1 (10.0)

Figure 1 Lesions of senile gluteal dermatosis (A) Thickened brownish scaly patches on gluteal cleft apex and both sides of the buttocks form “three corners of a triangle” with distinct horizontal ridges; (B): brownish scaly patches, erythema and shallow ulcers were seen in one patient; (C): A crusted ulcer can be seen on the skin corresponding to the greater trochanter of the femur.

Figure 2 Pathological findings of SGD. (A) The brownish scaly plaque patients showed significant hyperkeratosis, some with epidermal psoriatic hyperplasia, and perivascular lymphocyte infiltration. (B) The pathological manifestations of erythema patients include mild hyperkeratosis, focal hyperkeratosis, focal mild spongy edema of the epidermis, and small to moderate amount of lymphocyte infiltration around superficial vessels of the dermis; (C) Pseudoepitheliomatous hyperplasia and massive perivascular lymphocyte infiltration were seen in patients with ulcers.