Table 4 Factors associated with persistence as a HU into a subsequent year

Non-HU

1.00

1.00

1.00

Cost

2.73 (2.45–3.03)

1.85 (1.64–2.07)

1.77 (1.57–1.98)

LOS

5.67 (2.92–9.97)

3.60 (1.83–6.44)

3.36 (1.71–6.02)

SOC

8.20 (7.75–8.68)

6.71 (6.31–7.12)

7.40 (6.95–7.87)

LOS-SOC

16.72 (6.26–38.93)

17.28 (6.39–40.94)

14.04 (5.07–34.39)

Cost-LOS

7.41 (6.55–8.35)

4.07 (3.51–4.71)

3.97 (3.42–4.61)

Cost-SOC

16.30 (15.31–17.35)

9.83 (9.08–10.63)

9.43 (8.68–10.25)

Cost-LOS-SOC

31.59 (29.02–34.37)

17.61 (15.50–20.01)

16.82 (14.78–19.15)

Age at first visit

1.01 (1.01–1.02)

1.01 (1.01–1.01)

CCMI^b

1.27 (1.25–1.29)

1.24 (1.22–1.26)

PPS^a

0.99 (0.99–0.99)

0.99 (0.99–1.00)

 Female

1.00

1.00

 Male

0.71 (0.68–0.75)

0.72 (0.69–0.75)

 Chinese

1.00

1.00

 Indian

1.23 (1.14–1.33)

1.26 (1.17–1.36)

 Malay

1.02 (0.95–1.09)

1.05 (0.97–1.12)

 Others

0.93 (0.86–1.01)

0.93 (0.86–1.00)

 Foreigner

1.00

1.00

 Singaporean

2.35 (2.21–2.51)

2.27 (2.12–2.42)

 Subsidised only

1.00

1.00

 Both subsidised and unsubsidised

1.42 (1.34–1.51)

1.46 (1.37–1.55)

 Unsubsidised only

1.89 (1.78–2.01)

1.85 (1.74–1.97)

 Other puerperium complications of birth

0.35 (0.26–0.47)

 Normal pregnancy and delivery

0.41 (0.34–0.49)

 Open wounds of extremities

0.48 (0.38–0.59)

 Fracture of upper limb

0.48 (0.39–0.58)

 Burns

0.51 (0.28–0.84)

 Fracture of lower limb

0.66 (0.54–0.80)

 Other eye disorders

0.70 (0.56–0.87)

 Cataract

0.70 (0.59–0.82)

 Superficial injury contusion

0.70 (0.61–0.79)

 Cancer of breast

1.28 (1.09–1.51)

 Mood disorders

1.45 (1.11–1.85)

 Essential hypertension

1.53 (1.36–1.71)

 Female infertility

1.72 (1.39–2.12)

 McFadden’s R²

0.16

0.20

0.21

 Residual deviance

111,630

106,351

105,539

 Residual degrees of freedom

379,427

379,417

379,404

 Likelihood ratio test (χ²)

–

< 0.001

< 0.001